Funny, I can't stand her either. Not too sure why - she has a real air of self smugness and importance.
On the subject of programmes you won't watch if someone is on it - I can't watch anything that has the absolutely talentless and unfunny "comedienne" Sue Perkins on it - I can't stand the sight of her. I like QI and won't watch the ones she is on. Exactly the same with unfunny fat idiot Phil Jupitus - how he gets away with it I'll never know.