Dragon Valley,Bridgeport,Lucky Palms and Aurora Skies are my absolute faves.Like the large available lots of Moonlight Falls and I like to update the "hangouts" with LN's professional bars and a few other items (photo booth and that mechanical bull thing from Showtime) but I try to keep the adds and changes as minimal as possible or ,for me at least,the whole feel of the town changes too much for me to enjoy long.And I second or third (lost count lol) Rflong's Glenvale County for best world to customize for my kind of gameplay.Love it for raising generations of extended families and seeing how they do.Really want to try Storybrook tho!
Glitches,lags....give me that(actually I don't have those very often to really complain about) but I think open worlds are what keeps me still so interested in Sims 3. Happy Simming ,Everyone! :)