Gameplay:
1. Better options for babies, toddlers, kids, teens and elders
2. University!!
3. Ability to click on the stove and select exactly how many plates of food to make (any number) without having to click through the options to choose 1, 4, or 8.
4. Ability to choose a specific neighborhood like in Sims 2 and all the houses and everything are only in that style and all the sims created can only wear specific era chosen clothing, etc. So like, if I wanted the world to only be English Tudor and I wanted all the sims in that world to only wear specific clothing like seen in the Vampire pack, I could choose that. If I wanted to recreate Veronaville, then all the names would have to be Shakespearean.
5. Ability to follow everyone to work - not just specific career paths.. and add in Education so you can follow your kids to school and be a teacher or the ability to follow your kid to school and have tasks to do like eat school lunch, choose how well to pay attention to the teacher, socialization with classmates, be the class clown or the quiet kid or the nerd or the popular one. Teenagers get to choose between football, band, cheer-leading, math club, yearbook and all that other great stuff. Toddlers can go to preschool and up their skills while there. I'd like to be able to choose between being a nurse or a doctor.. maybe even allow someone to be a maid and let them travel to other houses to clean them for them if they are neat freak sims.
CAS:
1. Ability to make characters Aunt/Uncle/Niece/Nephew/Step/Ex etc.
2. Ability to choose color of hair accessory so if I want to have a dark haired girl wear a scarf, it isn't stuck to one color scheme
3. Ability to create families bigger than 8 characters even if they must be split up into different families for game play.
4. Ability to choose zodiac sign and better personality traits and favorite colors and so on.
5. Better aspirations and personality traits. I actually hate the aspirations and can't stand playing any of them. Thank god for cheats.
Items:
1. Bunk Beds
2. Swing sets with the ability for teens to hang out, and people can push each other... special swing sets for toddlers
3. Spiral staircases
4. More furniture options overall, and bring back some of the furniture styles from Sims 2 and Sims 3.
5. Better shower curtain options and shower and bath colors, floor mats specifically sized for outside the shower, better towel options.. Just more options of everything period!
6. Things that fit on the shelves better. There's so many little things that you can't even place on the shelves that should be able to be placed on the shelves.
Things I miss and would like back from past expansions:
1. Better world customization. For example, Strangeville is great but where can I put The Grunt House when the only real viable lots available don't even match the terrain of the original home? I miss the world creation of Sims 2 where the streets were lined out and you could plop the lot down anywhere as long as it was along the street.
2. Customization of character clothing, accessories, and all the furniture patterns. I don't care how long it takes to load the game. I would love to go back to being able to do different patterns and not be stuck with the same old stuff all the time in colors that don't even match. Like.. why give me a million hot pink/purple combinations but barely any wallpaper and flooring to go with it?