Alright if its any fictional character then the Doctor and Captain Jack Harkness. And Captain Jack Sparrow for that matter too :P
Mmmm, I could do bad things with the Doctor AND Jack Only Ten though. If Eleven wants in on the action I'll take him alone. Even though its still technically the same character, he has this awkward innocence I wouldn't want to corrupt Also, is it bad I crush hard on the character I named my son after? Oh Mr Jones, you can be my tea boy any day...

I'll come back with others eventually.