Lol. I find myself trying to explain this quite often. ;P

I don't actually like or admire Bellatrix. She's a psychotic minion who kills her own cousin. I find her a useful character to write in combination with the characters I actually love seeing tortured.

Hee. I'd say Umbridge or the Dementors are my least favourite characters. And even then I like to pair them up with Harry and/or Draco. :D

I'm much more squicked by the idea of Harry/Hermione or Ron/Luna, because those pairings just don't work for me psychologically.