(from his first appearance in Excalibur in 1995) He's been toned down a bit in recent years, no more cigarettes but still chasing women a bit. For a comic book character, he's pretty sexy, and there's a lot of fan art about him. :p Not as sexy as Hawkeye, but close.
I loved Captain Britain turning up in Secret Avengers last year. I hope there's room for him and Pete in the next one. And the Black Knight, too.
Oh, and of course my fan casting for Pete is Bryan Dick. :p No one else would have thought of him, but he fits- Wisdom is described as 5'9 and thin, and has a "don't mess with me because I will fuck you up" attitude- Bryan is good at that kind of character. Dye his hair black, stick brown contacts in his eyes, put him in a trench coat, and there you have a live Pete Wisdom! Can't think of anyone for Captain Britain, though. Dude is supposedly 6'6, 230 lbs,, blond hair, blue eyes, totally hot, and I don't know many British actors who fit the bill! :p