Khorrid is horrid! She has got to be the most obnoxious/irritating/fun NPC I've run across in any class. (+/-)
Zhorrid is hilarious, amongst other things. Echoing the previous poster: your opinion of her might well change. There are reasons she is the way she is...
...and she's nowhere near as bad as Darbin Sull, who isn't even fun- just obnoxious and irritating (but Darbin isn't a class-exclusive NPC so we all
have to deal with him at some point unless we choose to skip a big chunk of Corellia).