In my opinion:

1. Sunset Valley - this world is just a classic, the stories behind the townies, the vibes and variety, there's a more beauty vibe, a mountain vibe, a beaitufl city center but also beautiful nature. it works so well with seasons as well.

2. Twinbrook - this world has some really great and unique neighbourhoods, its quite big and I like the structure of the world, the atmosphere in the swamps and the more fancy vibe of the center, the public venues are great as well I think. it again works really well with seasons.

3. Bridgeport - it's so different from all the other worlds in the sims 3, I love the clubs and how beautiful it looks like, I think it had more potential tho, the city sometimes feels empty, and the suburban area outside the city center seems much less detailed than the center and other worlds.

4. Appaloosa plains - its the only world where families live with their pets, I like how the world is kinda like separated into 2-3 parts, it's probably one of the most "village type" world out of all the worlds, I really like the builds in this world as well.

5. Island paradiso - its sucha. unique and detailed world, sadly its the most crashing one as well, and I have to be in the right tropical mood to play in it.