I'm not so sure about his type but I did get a possible Introvert vibe from him. In interviews he seems to be reserved and reflective and lets face it if I was considered as attractive as him I think I would naturally be a little more unreserved and less timid than he is. He seems like he's not really the type of guy that likes to be the center of attention and seems perfectly comfortable in his 1 on 1 interviews.
My cold, snide, intellectual life is just a veneer, behind which lies the plywood of loneliness.
Well he's one of the most world renowned actors, yet he appeared in a cameo as a rockstar in Eurotrip just because he was filming at the same studio. Most of the characters that he plays seem J on the outside, but are actually very maleable and adaptable, suggesting P. His intelligence may also make him seem more J, as it gives him an air of absoluteness.