I really enjoy Lovestruck personally and find it really fun. I struggled to get into both for rent and horse ranch. I found both of their worlds too quiet and you don’t really notice the gameplay of either of those packs unless you focus on it.
I really enjoy the Lovestruck world and all sims I play will have the romance skill and dates and turn ons etc so to me it feels the most like an expansion. I think it has the best CAS of the three too. I did have a lot of fun making rental lots and I’m sure I’ll enjoy landlords, horses and nectar making once I get around to it though.
This is just my opinion though. I think of the three horse ranch is probably the most popular.