I'd be willing to try living in any of those places! I'd want to try living in the treetops, because I love trees, but I would also fear falling. Similarly, living underwater really appeals to me, but I would probably feel claustrophobic. I would want a room (or maybe the whole "house") to be entirely made of glass, so that I could simply sit and watch the sea and its creatures. More realistically, I've always really liked the idea of Hobbit Hole-style houses. If I were rich, I think maybe I'd have one of those built for me. I'll bet it would be very cozy; enclosed, Earthy.
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"A flower falls, even though we love it; and a weed grows, even though we do not love it."