He and I think a lot alike.
Are you watching Torchwood as well? Aside from the Children of Earth miniseries, which is excellent, they change his character from being a fairly happy-go-lucky bisexual to a miserable gay bloke who doesn't have any friends.
I spent two thousand years buried alive!
My favourite character as Ace. The simple reason being that I had grown up through the Tom Baker / Peter Davison / Colin Baker years (during which K-9 had been my favourite character) and by the time we got to Ace, that the INSANITY OF SOMEBODY USING A BASEBALL BAT TO SMASH UP A DALEK was somewhat refreshing to a 13 year old at the time.
Oh and she had tits. That helped, too.