Well, as usual, I'll go against the grain and say my least favorite is David. I didn't mind him too much until Quentin began haunting Collinwood, and I guess David was supposed to be "posessed", but to me he didn't act posessed at all, he just acted like an utterly intolerable brat.
Most favorite would be the girl who was involved in that whole Rose Cottage thing. I can't remember her name (probably the one everybody hates
) I haven't seen that storyline in years, but I remember her being fairly likable.
Personally, they could have left all the children out of the show and I would have been one happy camper.