Things you DON'T want in the game

Death notification phone calls. Please let us turn them off.

This is purely personal but I don't particularly want to see any more US based worlds... the amount currently in the game makes me long even more for the days of The Sims 2 when you could customise your worlds to better fit your own stories. I don't even mind that there's no open worlds, I just want a bit more variety.

I don't want to see any more of the high fashion clothing that only suits teen/young adult sims. There's plenty of that already in the CAS library if you want it but we seem to be lacking a more traditional style of clothing that might suit a 50 year old just pottering around at home. Most of my sims of that age group end up wearing CC clothing.

Teleportation.

Chores
Life stages (no preteens, no "mid adult", young elder, etc)

Real-life illnesses
Big fat no. Like, I have even rejected otherwise good sounding mods just because they included rl sickness. I wouldn't mind if the current illness system had more consequences but there is absolutely no situation I want to see a "your sim has cancer" message ever in my Sims game.

More "trendy" social media influencer tik tok whatever modern tech nonsense
Enough. Don't care if it "reflects real life". It's annoying (both irl and in game), ages poorly, and makes for a boring gameplay. They already make me want to smash their stupid phones. And look... I myself might be bit of a tech-head geek in love with my PC but, bruh, I have zero interest to watch my sims sit in front of a computer while I'm sitting in front of a computer playing a game.

Same ol' generic suburban worlds
I want more Forgotten Hollows a.k.a worlds in which they went "all out" with a theme. The squandered potential of RoM annoys me. Like, yes, it has the magic realm which is gorgeous but you can't live there and the livable world itself basically has nothing magical about it and just looks like your usual quiet woodsy neighborhood (with weird humongous driveways in a game with no cars). Werewolves at least had that grungy aesthetic and some exploration.

RL brands, franchises, celebrities, characters, etc
Basically what @Flikka_Flikka said. I too am fine with unobtrusive parodies and subtle nods (e.g. "Game of Llamas" on TV Season Premiere Day), but I don't want to have my immersion interrupted by ads. That is one reason (among others) why I'll never get Journey To Batuu even though I actually really love Star Wars (the old school stuff especially). That pack is basically just an ad they forcefully pushed through against player wishes.

Luxury/expensive items. I would prefer more things for the poor. Rags to riches is a very popular theme among Simmers, but there's never content specifically focused on poverty. I guess it's too depressing, especially for the cheerful and positive tone of this game, but usually by the time I can buy all the most expensive items and build a mansion to house them, it's time to play with another household.

Much of the time is spent with cheap furniture (lower bills) in a small house (more efficient) while you improve your economic situation, so I think it would make a bit more sense to have more content focused on that part. Although I doubt they will do that, we will have to continue decorating our poor house with content from other packs (university, horror themes, etc.) that incidentally have some precarious items.

Disheveled clothing. Unless they have a clothing system where you can have those options as an alternative, just put it on properly.

New worlds: At least not as long as new worlds are so small and useless. We already have 25 worlds in game clogging up the system, most of them entirely useless because they are so small or specific, many of them extremely similar. If new world are added make them big, explorable (not just pretty), unique, lively, customizable.

Venues that are tied to a world: Aka high school. If you give me a new venue, give me control over it. I don't want my Mt Komorebi or Tomarang kids going to Copperdale every day for school. I want school to be where my sims are.

Computer related jobs: Several already mentioned this, and I completely agree. Enough already! Instead, why not let me be a librarian (active in any library), museum curator (active in any museum), nanny (gigs like dream house decorators where you go home to people to take care of people's kids), figure skater (seasons, semi-active), nurse (active in get to work), high school teacher/headmaster (active in high school years)...

preteens: I know many people want this, but personally I could not care less. Now mid-adult, that I would want, mostly to keep the game from generating babies in near elders. I also want more things for each age to do that is age specific.

Useless objects that look useful: Already mentioned but I could not second this more! If you give me something, let me use it or do not give it to me at all. Also make useless objects in game useful by assigning them a purpose. Like they did the shoe rack and vampire radiator in the last patch - well done! More of that.

Any more occults, especially fairies. I know some people want these things, but I would rather not have them in my game.

1. For a long time now I've been begging for long pants (M and F) only to for the creators to double down on the high waters and wide legged cropped pants. Do we finally have enough high waters and cropped pants in game to move on to long pants? Pretty please? Maybe we could have a plus/minus or ticky box built into the game for the CAS/Build items so you can mark your favorites so they show up at the top of the list and blacklist the stuff you loathe so it stays at the bottom of the list (Yes, I know about MCCC but it's too complicated).
2. No more IKEA furniture, it is so boring and blah. Plus, it looks uncomfortable and uninviting.

I don't think I need cars, hotels or more life stages. I like occults but I don't know that fairies or zombies would be all that fun or interesting, maybe add baby/mini dragons to pets, that would be fun. I also think we have a lot of food choices now, they need a 'favorites' and 'nope' prioritization in the list just as CAS and build items do. Or really expand likes and dislikes for the sims and the watchers could get the 'favorites' and 'I really hate these pants/hair/food/etc.' markers.

Here's my list:

- I don't want any more "text adventure" rabbit holes. Please stop. I think it's safe to say that most of us would prefer our sims to experience real adventures with real objects and real interactions in a real setting with real sims and real characters. Getting a few of them has been a nice little addition to the game, but now we all worry that these rabbit holes are going to become a trendy replacement substitute for the real thing.

- Speaking of trendy..... I don't need any more trendy fashions, trendy furnishings, trendy name brands, or trendy internet fads (influencers, social media, et al).

- I don't need more cell phone interactions. I know the cell phone is an all-encompassing thing (read: addiction) these days for most people in real life, but sometimes it would be nice if our sims could enjoy interacting with other items in the game, including what's going on in the immediate world around them. Please put down the dang cell phone. Please.

- I don't need any more invasive household chores. Too many things breaking, too many things going up in flames, too many smelly/messy/dirty things accumulating, too many boring chores demanding immediate/constant attention and upkeep. I want my sims to have enough time in their day to enjoy themselves with other things like: hobbies/activities, visiting places, going on adventures, spending quality time with other sims, improving their skills, or advancing their careers/education. "Too much work and not enough play makes sim a dull simmie."

- I don't need any more new death types. There's too many things that can kill off my sims as it is... more death types just means having to add more mods into my game to stop all these death risks from happening. Sometimes it would be nice if my sims could just use an object (telescope, vending machine, murphy bed, etc etc) without having to worry about getting murdered by it all the time. Sure, new death types are fun.... at first. But after 71 DLCs and almost as many new ways for our sims to die, the novelty of said new death types wears off rather quickly. :|