Willow Creek - I had to give the top spot to good old Willow Creek. I like the lush green world with some murky swamps near the edges. The building style is something I enjoy as well. I really love the neighbourhoods with playgrounds in them, especially the commercial district.
Fogotten Hollow - This world appeals to me most style wise but the problem is its small size. If there was more to do it would probably get the top spot on my list. I have to say I haven't live there yet, kind of saving it for later?
Windenburg - Windenburg is amazing with its four giant neighbourhoods. The isolated island is my absolute favourite. The downside of Windenburg are the long distances and sparse passerbys which make the town center look dead.
Oasis Spring - Although I don't care for desert world or the building style that much, I think that OS has plenty to offer with well balanced neighbourhoods.
Newcrest - I'm not a huge fan of empty worlds but like WC and OS I think that Newcrest is well balanced when it comes to lot sizes, playgrounds, fishing spots etc.
San Myshuno - I like the apartments and don't really mind the few lots but there are some problems especially with the center park lot (no one goes there). I wouldn't want to play in the city all the time but it's very good when looking for an alternative to regular sim life.
Del Sol Valley - Haven't actually lived there yet so it's a bit early to say but the hollywood style doesn't really appeal to me. The lot sizes also seem a bit problematic for my gameplay. I do like the districts though.
Brindleton Bay - I have tried to like brindleton Bay but for some reason I just don't. There are many wonderful things like the lighthouse and the wharf. Still it seems boring to me and the lot placement feels kind of awkward.
Magnolia Promenade - Almost forgot Magnolia promenade. I actually like it but feel like it adds nothing new on the table. Combine that with its tiny size and I think the last spot is deserved.
