Some of these are really difficult to lump together, but I'd probably go with these:
- Get to Work, Businesses & Hobbies, Dine Out, Dream Home Decorator, Home Chef Hustle
- Get Together, Movie Hangout, Bowling Night
- City Living, Industrial Loft, For Rent
- Cats & Dogs, Cottage Living, Horse Ranch, My First Pet
- Seasons
- Get Famous, Luxury Party, Vintage Glamour, Moschino, Secret Sanctuary, Spa Day, Décor to the Max, Modern Luxe
- Island Living
- Discover University, High School Years
- Eco Lifestyle
- Snowy Escape, Outdoor Retreat, Jungle Adventure
- Growing Together, Parenthood, Kids Room, Toddler, Little Campers, First Fits, Storybook Nursery
- Lovestruck, My Wedding Stories
- Life & Death
- Vampires, StrangerVille, Realm of Magic, Werewolves, Spooky, Paranormal, Crystal Creations
- Perfect Patio, Romantic Garden, Backyard, Poolside Splash
- Blooming Rooms, Greenhouse Haven
- Courtyard Oasis, Desert Luxe
- Cool Kitchen, Country Kitchen
- Fitness, Throwback Fit
- Laundry Day, Bust the Dust, Everyday Clutter, Bathroom Clutter, Basement Treasures
- Grunge Revival, Goth Galore
- Simtimates Collection, Sweet Slumber Party
I'm not sure where to place Journey to Batuu because I don't own that one, and most of the kits are difficult to place, too. The same goes for Tiny Living and Nifty Knitting, and I think Seasons as well as Life and Death are perfect stand-alones.