What are your top 3 of each pack type?

Kits

1. Tea Time Solarium 

I only have three kits but only one is a must have for me now.

Stuff Packs

1. Crystal Creations 
2. Paranormal Stuff
3. Home Chef Hustle

Pretty much the same with you here.

Game Packs

1. RoM (I am a sucker for this pack, I love spellcasters and the CAS/BB so much for this pack)
2. Vampires (though I don't really play vampires the CAS/BB works with RoM decently)
3. Strangerville (the BB is great and the storyline was well done)

Expansion Packs

1. Life & Death (the reason I even started playing Sims 4, CAS/BB, Macabre trait is amazing, I love the Tarot reading/collecting, etc.)
2. Enchanted by Nature (I don't play fairies but I love the apothecary skill, naturopath career, Mystical and Disruptive traits, even the aliments, world, etc.)
3. Cottage Living (I like the Simply Living Challenge, the world, animals, etc.)

I'd say R&L is tied with Cottage Living, as I really love Dynasties, Noble Career, the world, Swordsmanship skill, but I think Cottage Living just has more.

Seriously, only 3.  Ok here goes:

Expansion Packs

1. Get Together
2. Cottage Living
3. Enchanted By Nature

Gameplay Packs

1. Werewolves
2. Realm of Magic
3. Vampires 

Stuff Packs 

1. Crystal Creations
2. Paranormal
3. Spa Day

Kits

1. Storybook Nursery
2. Prairie Dreams
3. Castle Estate

Kits

1. Essential Glam (all my sims use this)
2. Cozy Kitsch 
3. Poolside Splash

Stuff Packs

1. Nifty kitting
2. Moschino Stuff(only because of the tripod)
3. Toddler Stuff-(just for the CAS)

Game Packs

1. Dine out-(I need restaurants)
2. Spa Day-(Wellness skill is one my favorites)
3. Parenthood

Expansion Packs

1. City Living-(Only city in the game)
2. Cottage Living-(I like the gameplay)
3. Island Living or Seasons-Can't decide. I love holidays. But Island living is the only tropical feeling world and love vacationing there.

Most of my gameplay revolves around realism and family gameplay so my favorites focus on that.

Expansion Packs

1. Horse Ranch
2. Cottage Living
3. Cats & Dogs

Game Packs

1. Parenthood
2. Spa Day
3. Dine Out

Stuff Packs

1. Nifty Knitting
2. Home Chef Hustle
3. Crystal Creations

 Kits

      1. Greenhouse Haven
      2. Blooming Rooms
      3. Book Nook

Discover University and Growing Together would have been my fourth and fifth EP choices. High School Years and My Wedding Stories would have been my fourth and fifth GP choices.

Expansion Pack

1. Horse Ranch
2. Growing Together
3. Lovestruck

Gamepacks

1. Spa Day
2. Strangerville
3. Dine out

Stuff packs

1. Crystal Creations, before collecting gems and crystals felt obsolete. It gave them purpose with a fun skill 
2. Moschino 
3. Toddler Stuff

Kits

1. Simtimates
2. Kitchen Clutter
3. Basement Treasure

The kits was very hard with between most of the CAS and Clutter ones, and a few BB. Lots of good ones in there. 
Horse Ranch I remember not expecting much but after testing it out, it quickly rose to my most played pack/world☺️

Expansion Packs

1. Horse Ranch
2. Cottage Living
3. Island Living

Game Packs

1. Jungle Adventures
2. Dine Out
3. Spa Day

Stuff Packs

1. Tiny Living
2. Home Chef Hustle
3. Nifty Knitting

Kits

1. Greenhouse Haven
2. Riviera kit
3. Castle kit

This was hard. Cats and Dogs is probably tied with Growing Together, but can't live without the little furry friends.

Expansion Packs

1. Horse Ranch
2. Cottage Living
3. Cats and Dogs

Game Packs

1. Strangerville
2. Jungle Adventure
3. Dine Out

Stuff Packs

1. Crystal Creations
2. Nifty Knitting
3. Bowling Night

Kits

1. Garden to Table
2. Kitchen Clutter
3. Industrial Loft

Expansion Packs
1. Growing Together (Infants and the milestone system flesh out the game a ton, and I love how the compatibility system adds more depth and dynamics to sims.)
2. Life & Death (Great theme; great world, most ideas are fleshed out; the fetch quest system feels more intuitive and rewarding than what we usually get; the BB is extremely unique but versatile; ghosts are now super fun to play with.)
3. Cottage Living (I love running a farm. I don't do it often, but it's such a unique way of playing the game, and it's something I've wanted since at least the Sims 2 days)

Game Packs
1. Realm of Magic (Witches witches witches witches witches)
2. Dine Out (With mods, it's great)
3. Werewolves (Fun and unique BB/CAS, werewolves are fun to play with, and I like all the lore and detail put into the pack and its townies)
Honorable Mention: Spa Day. The refresh made it a lot more fun and engaging. But Werewolves slightly edged it out.

Stuff Packs
1. Paranormal (The gameplay is a lot of fun, I like the furniture, and it has my favorite pair of pants in the game. One of the best DLC for the game, period.)
2. Nifty Knitting (Knitting is fun. I like when my sims have hobbies)
3. Crystal Creations (The BB/CAS is good. But also the bar is kind of low for Stuff Packs so yeah the BB/CAS being really good is enough to put it near the top.)

Kits
1. Cozy Bistro (I rarely find uses for the bistro theme. But when I do, I love using it. But there's a few assets (a poster and the wallpaper) that I like to use often.)
2. Decor to the Max (Wallpapers, eu te amo. I use them for accent walls all the time.)
3. Desert Luxe (There are better kits out there, but I use the curtains in nearly every build. They're just too good.)

Expansion Packs:

1. Horse Ranch
2. Growing Together
3. Get Famous

Game Packs:

1. My Wedding Stories - One word, Tartosa 😁
2. Werewolves
3. Vampires

Stuff Packs:

1. Home Chef Hustle
2. Toddler Stuff
3. Crystal Creations

Kits:

1. Blooming Rooms
2. Kitchen Clutter
3. Bathroom Clutter

Ooooh, this is going to be tricky for me. I remember back in the day when EPs weren't that big a deal to me but Game Packs were everything. Now there's a lot of awesome EPs so it's hard to pick my three. I suppose it depends on what my mood is and what kind of Sims I feel like playing at the time. So all my answers are always subject to change, though I'm most definitely an Occult/Fantasy/Sci-Fi/Anything Weird Player. But I'll give it my best shot, lol. 

Kits (Okay, I'm already having trouble choosing, lol):

CAS Kits
1. Goth Galore
2. Fashion Street
3. Prairie Dreams
Honorable mention: Silver Screen

Build/Buy Kits
1. Storybook Nursery
2. Secret Sanctuary
3. Wonderland Playroom
Honorable mention: Castle Estate

Stuff Packs 
 1. Paranormal
2. Spooky Stuff
3. Crystal Creations
Honorable mention: Vintage Glamour (I love a butler!)

Game Packs 
1. Vampires
2. Werewolves
3. Realm of Magic
Honorable Mention: Jungle Adventure (Selvadorada! *Swoon*😍)

Expansion Packs (This one is just too hard, it's killing me!)
1. Life and Death
2. Enchanted by Nature
3. Horse Ranch
Honorable Mention: Island Living and Lovestruck (I need them!)