Yo, who here actually likes the character Katie? To me, she is the only character I do not like. It's a combination of her weirdly anorexic face with big eyes, and her attitude.
Edit: Okay I just looked at the screen shots of her. The character is not ugly. But my disdain for the character makes her ugly to me.
Katie definitely starts off as a prickly one, but I'd also say that a lot of her haughty attitude is a bit, not dead serious. She uses humor as a way of shielding herself - both from the world at large and serious topics in general. There's a decent bit of depth to her character if you get past the initial layer of bitch. Don't blame you if you don't, though.
For me the disliked/less-liked ones are Zarah and Natasha. Wanda I don't feel counts, she's set up as the hate-fuck from the start, and arguably Natasha falls into the same category, but her "redemption arc" is basically "you had your revenge, now please fuck me and degrade me" which can be hot I suppose but doesn't really make for a likeable character. At least Wanda gets some character development. Zarah on the other hand is just very pushy, which I'm not a big fan of. Elaine and Bella are both very hit-and-miss, but not enough to lump them in here.