I'd say Matt is pretty far away from a typical leading man, unlike Tennant who looks like he's just walked off a Calvin Klein commercial half the time.
Would definitely want an older actor next time though. It's getting ridiculous.
I sort of agree, but it comes down to how the character's played. Tennant was, what 6/7 years older than Smith when they both started, yet I felt Tennant was too young and took a year or so to grow into the role, yet Smith hit the ground running and felt plenty old enough.
The opposite of smith would be an older Doctor who acts younger really.