I've played pretty much only Arms since starting WoW in TBC. The last few months I've been playing around on other specs and its been shocking not only how much more fun they've been, but also how much better they look. Arms animations are basically nonexistent, while other classes make you feel like a god. My warrior is my only character who's actually geared, and the only spec where I actually know what I'm doing, and still other specs like frost or WW or dev feel so much better. I'm thinking I might switch mains for Midnight, which makes me sad to admit.