I'll probably suggest something more but I have to say to never watch Mahou Shoujo Madoka Magica, no matter what anyone says. It's not a very good show, unless you like seeing the MC whine and do nothing the entire way through. Makes Shinji from Evangelion look good.

The show ended up sorta good for me because of the other characters and a few other things, but it's not something I'd watch again. Only other reason to watch it would be to be with the "in" crowd and not go "wtf you taking about?"