I actually like Ellen Degeneres–the gay comedian who knows more than one joke (hint, it ain’t about race relations).
As for dislike, all celebrities with political views, even the few conservatives. You’re here to look pretty and say your lines right, not order our lives for us.
Otherwise, I’d have to say Steven Seagall (or however you spell his name). He’s annoying, he can’t act, and he’s apparently a despicable human being. Also the choreography in his fights makes it impossible to see what’s going on–which I regard as grounds to revoke basic human rights for a Director of Photography or fight choreographer.
On the other hand, Chuck Norris is annoying and can’t act, but he’s apparently very decent.
I’d also have to add Ashton Kutcher. Him? An irresistable lothario? He should be behind a counter, assisting others to rent movies, not starring in them.