I just had this experiance over my vacation where I saw something that expected my to root for the main character but I just couldn't because I hated them. It's on the tip of my toungue.
I guess in all seriousness I'd have to say the Punisher as my anithero that some people don't seem to like if only from how they know me. I'm pro law enforcement, anti vigliantie yet I'm enjoy watching The Punisher tend to those that the law is unable (or unwilling) to touch.
If not him then Barack Obama. What? is he not a antihero?