1) I can easily see this being built, but maybe not so dramatic, I don't see how it can stand, but definantly the most interesting and just screams GREEN, nice touch with the windmills, got my vote!
2) While the building's are nice, the plaza seems to be a mess, and really theres nothing creative at all, had this been a different competition these would have been great towers. Only tinted windows and solar panels, it just seems all to uncreative and boring, pretty renderings though!
3) This one almost got my vote, now this is a GREEN building, excellent job, very creative, very modern, I can easily see this one being built just about anywhere, not too daring but not too boring, but I just didn't like the blank walls, that lost my vote.
4) I don't really get this one at all, there's just no info and I don't see how this building could work out, balconies that long with a building that thin, I don't think its very realistic. The trees would weigh down the balconies, roots would break through, causing it to collapse. However with work I can see this could be a very beautiful building with hanging gardens and a modern design.