But to finally respond to the original post - I pretty much think I'm a P in every regard: I'm clean but messy, I balk at restrictive schedules, I'm annoyed by corporate environments, my life as a whole has not had a step-by-step cohesive plan, I live for unplanned days, and sometimes go off on larks.
That being said, I still like to get my homework done ahead of time so I don't have to worry about it. I like to get an idea of what I'll write about weeks and weeks before I actually sit down and write the paper, trying to do it all at once is truely stressful. I don't really care for random social invites either, I honestly like to plan when I'm going to hang out with someone, unless they're a person I really enjoy being around or I'm truly bored. I feel invaded if someone just knocks on my door and drags me out somewhere unless I'm specifically in the mood to do something like that. I've heard that this last sentence is actually a common INFJ trait.
I know I act J when I'm stressed, but then again in MBTI NFP under stress can go all STJ on your ass.