You don’t have to have a legitimate reason. You just can’t stomach their face or voice.

Warren Beatty
Sally Field (I’ll give her a pass in Forrest Gump)
Holly Hunter
Ben Affleck
Wesley Snipes (I’ll give him a pass in Passenger 57)
John Wayne
Jared Leto
Orlando Bloom
Jack Black (Not everything he’s done, but I can’t stand his shtick or music. I hear he’s nice in real life.)
Madonna (Her acting is real wooden. Ray of Light is a terrific album, though.)
Gwyneth Paltrow (More as a human being than an actor.)
Julia Roberts (Ditto, above. Everything about her, really.)
Sharon Stone (She was good in Casino coughScorsesecough)