[Cirrus]

It strikes me that so many of them are so similar looking. I actually like the wavy glass aesthetic very much (the boxy crystal version less so), but they're all sort of interchangeable. It's enough of a cliche that I don't feel any are extraordinary... So I voted for Emirates Park, as the only one of the more unique-looking towers that isn't horribly out of proportion.

If I were to vote for one of the wavy glass ones on the list, I suppose would be the Guangzhou International Finance Center, however I think the London Shard and London Pinnacle (apparently too short to make the cut here) are better examples overall.