Yes, it's annoying that I can't place it entirely. It's NOT because he looks cute. It's a little because of his intelligence. A lot because despite being a guy he talks a lot.( Thank God for that little study that claims that men talk as much if not more than women.) A little bit because he likes midnight phone conversations. Any man who's willing to stay glued to his phone for more than 2 hours matching repartee for repartee can't be all that bad.
And he looks like the guy who'd be very interested in making something work. Most of his roles are about the guy in checked shirts who's quite cool in an 'alternative' sense who almost got the girl. He's the Jeaneane Garofalo of romance. And therefore more attainable. Yet worth pursuing when you've figured out that the sexy scowling professional salsa dancer is interested more in crack than human beings.