What was your least likeable character(s) on the show Charmed? For me it was Simon Marks.
He gave me the impression that his family was like the Hiltons, And guess who I think The Marks Family's little Paris Hilton was there. He was projecting such a stalker alert vibe, Like Dude, she said no many times, back off. And for being a Half-Angelic being and he was so arrogant that Mortals were considered like a flawed race to him being a Whitelighter-Witch.