Peter Capaldi has those beautiful blue eyes. I'm sure he will make epic use of them the same way Rene Auberjonois used his eyes as Odo. He is one of those men who seems to get sexier as he ages. Kind of like Sean Connery and Patrick Stewart.
Plus, Capaldi has a smile that takes years off his face and he has the most adorable boyish laugh. Proof: http://www.youtube.com/watch?v=i5zhExXiL8A
I suspect they chose an older actor for the next Doctor because they want him to be more in that fatherly figure role again.