I'm a huge fan of towers as art. (Towers as malls, no matter how well decorated, interest me less. Just my personal aesthetic.) Some examples of ones I've particularly enjoyed are those designed by awesome sauce01, Atlantis and FyodorD.
I'd love to visit more creative non-mall towers. Does anyone know of any others that fit this general profile?
Thanks!
P.S. I also want to give a shout-out to Rathany, who has a great tower that helps people get all the locations in game. It's a wonderful tower even though it sells TP scripts. (And thanks to Minkey for helping me remember Rathany's name!)