Let's see. He's highly intelligent (builds cities, constructs remote-controlled espionage robots/cute robot kitties- maybe it's just me, but smart men are sexy), has an actual moral compass (and can actually follow the right path with it- just took him a while to figure that one out), he's well-groomed and very handsome without being girly or 'bishie', he has a sense of humor (if he didn't, he wouldn't have made Cait), he's a bit eccentric (the best guys usually are), he doesn't wangst like the rest of the cast.... I could go on, but I think you get the idea. :3