Although alot of those tanks are very aesthetically pleasing I'll say the same as I say every other time I've seen a thread like this. My personal stance is that the fish come first, I 'build' a tank around their needs... not put them in something that looks good just as an ornament.
Plus the maintenance on some of them is silly, like the round one connected by tubes and such... how exactly would you clean that when algae started building up?
And the presurrised one holding the water in... hopefully they're regularly refreshing the air to allow for gas exchange.
Gotta say my favourites (by far), are the takashi amano tanks followed by the really large cylindrical tanks. I don't really like any of the others. The phone booth one is ok, but just not sustainable as even for coldwater fish it wouldn't keep warm enough in winter for goldies (in the Uk anyways), and they'd cost a fortune to run heated...