1 = EP14 Horse Ranch - love it for something different to do. The world is awesome, I like the mini animals, the nectar making and the horses are great.
2 = EP13 Growing Together - love the rec centres, being able to have guests stay over, compatibility, and the extra infants interactions, kids interactions etc.
3 = EP17 Life & Death - I really like the funerals aspect as it gives my beloved sims more of a special send-off when they depart and being able to leave stuff in a will is fab. I'm finding the reaper job a little boring and am not that interested in ghosts. I haven't tried a rebirth yet but I might do that with a favourite sim. I like doing stuff for the bucket list, it gives my sims some extra stuff to achieve.
4 = EP16 Lovestruck - Haven't fully played the romance skill but I've enjoyed the rest of it. I like Cupids Corner if I'm stuck finding a date for a sim.
5 = EP12 High School Years - fairly rubbish gameplay - I bought it late (and cheap) to get the BB stuff and am glad I didn't pay full price. Following teens to school got old really fast, as I knew it would. The occasional prom is okay for story screenshots. The funfair is a yawnfest. The thrifting is boring.
6 = EP15 For Rent - Too bugged so I have avoided playing rentals since it ruined a previous game save. I regret buying this pack, I don't even like the world.
I can't rank EP18 Businesses & Hobbies - only bought it today so not tried it yet.