Episode 3 of Season 6 is direct evidence that House is ENTP.
Every episode of House confirms the lead to be an ENTP.
I used to work under a guy who was painfully similar, from the smarting and incessant repartee to the odd blend of skylarking and authoritarianism. Even whiteboard sessions saw him reconciling group contributions with his need to compete -- and creatively eliminate -- me and my coworkers. His ace was Fe, rather than House's Ti, so used diplomacy instead of brinkmanship. Couldn't trust him any more than House, though. And he wasn't as good as the writers make House, so our group would breathe easy whenever he was away.
Why do some people seem to think this laid-back, loose man is a J?
I figure because many people start out with the assumption that he's INT (because he's obviously NT and it's easy to assume he's an introvert because of his reclusiveness), and he seems too decisive and action-oriented to be an INTP. That's why my first thought was INTJ anyways.
After watching more episodes and reading the thread (yes, I did actually read all of it), I agree he's an ENTP.
Most people seem to type him as INTP. And if you watch him for a moment, that does seem likely.
But there's some things about him that just don't match him with me, type related.
He says he's always absolutely rational, not realising absolute rationality is unexistant in the first place unless he believes he is omnipotent, which he doesn't. :P . Quite frankly, his rationality lacks rationality. He openly uses his sarcasm whatever the cause of his outbursts and does not regulate his inner thoughts. He's contradicting himself more than once. His introverted perks appear to be enforced by thought. He doesn't seem to come close to INTP rationality. Every aspect of his supposedly INTP like state are pretty much unhealthy outbursts.
Quite frankly. I think he's an unhealthy ENFP addict in pain trying to hide, and not an INTP.