I read quite a few Tintin books a couple of weeks ago, and I kept pegging him as an xxTP (mostly ENTP and ISTP). His method of deduction seems redolent of Ti. I don't quite discern the Fi, which is apparently his dominant function according to the general opinion here. Tintin takes on cases to satisfy his thirst for adventure and excitement. Or maybe, I need to read more of 'em Tintin.