I try to bring elements of my own personality to every character I've played, but I think I'm pretty similar to the character I'm playing now. The biggest departure would have to have been Freaks and Geeks Sara, who was this sort of subordinate and shy girl.
There was a whole display set up of all the X-Men paraphernalia. My wife couldn't resist telling this 5-year-old boy that I was Wolverine. The little kid looked up at me and he was staring at me.