Since I started playing 3 again I have played a bit of Isla Paradiso, Moonlight Falls, Dragon Valley, a little in good old Sunset Valley, and Midnight Hollow. I really like Dragon Valley, Aurora Skies and Midnight Falls, and I feel because they and Isla Paradiso are later towns they were built with a lot of space for the community lots of the various expansions.
I have not played any CC worlds beside Builder's Island for the sake of building space, but a couple brought up here sound good if I feel like fielding another couple of sims in their own towns.
But you know what I feel I am liking the best? Oasis Landing. The only downside it has is no grocer, but if I am mindful to pack a pile of good produce in my sim's
storage box, then I can buy them a future house and set up their own garden and invest in a Plumbot with the gardening trait chip to tend to it (plus I am a huge fan of the
gardening Gnome too). One thing, I love the rugs that allow for indoor and balcony gardening that came in ITF, as they put an end to needing "moveobjects on" to get plants indoors, which in turn puts an end to the incomplete building moodlet if you build a greenhouse without a floor.
(And again my obsession with gardening in the Sims comes up.)