Wow...I didn't realize how hated Mirror Kira was. I found her to be a loose cannon and totally dangerous. And yes, camp. I thought she was a great character for the MU. Sure she was 2D like most Mirror characters, but it was fun to go there the few times they did. Like a little dessert for the actors. And fun to watch (for me).
Also, there's a difference between feeling hate for a character (which is often a good, intended thing), and hating the idea or direction of a character in general. I think Winn falls into the former category for most, at least she should.
I guess I'm also in the minority because I loved Vic Fontaine. To me, he brought some fun and charm to the show.