I recently started dating an INTJ. I think he is borderline P. I can't say I know him really really well yet, but in a way, I do feel like he judges everything I say or express to him. Like he's trying to figure out a part of me that doesn't exist or comes out when I'm in a certain mood. It's not like a direct feeling of "oh he's analyzing me right at this moment". I warned him that I get moody sometimes and can throw a tantrum once in a while. He said he was okay with that since he's dealt with a lot crazier girls than me and still hasn't found a reason to dislike me yet. Him telling me this makes me slightly nervous, like I need to watch what I say so he doesn't think I'm stupid. I usually don't hold back and I think he sort of enjoys my slightly ditzy-ness, but I think he knows I can hold a good, intelligent conversation.
I'm also trying to figure him out in a way, but not who he is, but rather how he can become if he opened up more.
If this relationship passes the 3 month mark (that seems like the average length for me, not including one 2 year relationship), then I will vouch for the ENFP + INTJ = potential to be good stuff if he isn't a complete prick. I know, it's pretty pathetic.