Dave unfortunately gets this status, despite only being a pervert and nothing more.
Metagaming: Somehow Joe knows that Paper!Shadow and Shadow are the same person (which he only met both of them once each). Without asking. Oh, and he says he exactly knows they're the same person, not thinks they may be. The other problem is that he's already Breaking the Fourth Wall with his knowledge of this.
Shiningknight has done this quite a few times before.
Romantic Plot Tumor: Good luck keeping your character interesting since it de-evolved into this. You don't have a relationship? Ignored! Okay, not that bad, but it's heading there.
The Scrappy: David Shine for being extremely creepy. Layla for her god complex and forcing people to pay attention to her.
Wangst: As usual, some of Hydronix's characters are hit with this.
A more prominent example is Wren, an Author Avatar (kind of) with a pretty crappy life. Albeit, he whines about it more than he should. He's slowly getting better, though.