Sort of a hybrid between Stephen Fry and David Mitchell (British comedians for those who don't know). Obviously whenever David appears on QI, I get a lot of jokes.
Resembling either of them isn't too bad.
I don't mind being told constantly I look like them, and I'm actually starting to like it, partially because I have an almost encyclopedic knowledge of historical and political events (like both of them) and can get 'agitated' when in debates which adds to the whole "you look like David/Stephen!" thing.
I just get peeved when people think I'm exactly alike them. I may have a similar appearance and interlect, but unlike Mr Fry, I am not gay...