A couple more observations: (Feel free to yell "Shut the %#@£ up already!")
1) I have some pretty bad pride issues. It's not simply about avoiding humiliation, like I described previously; it's like, I take myself pretty seriously, to the point where, if someone pokes fun at my personal demons/neuroses, I become bitter and start wondering - and asking, sometimes - what is wrong with me. My ISFP mother thinks I need to chill a bit... Sometimes I respond to "good-natured ribbing" with a distraught "Is this about [X]?", which can be a buzzkill. I've heard INFPs are more laid-back, so could this be an indication of INFJness?
2) Someone asked me, at the beginning of the thread, if I wasn't an ISFP. Truth is, while I'm theoretical, I'm not sure I'm creative like many INFPs are said to be. I don't draw or paint (my artistic abilities are somewhere between "sub-par" and "hellish"), and, while a good number of people say I write well, I just don't feel the oft-mentioned "itch". My ma says I "absorb" too much and don't "give back", metaphorically speaking. Since INFPs seem to crave self-expression through these outlets, and are usually described as "creative", do you guys suppose that means I'm more likely to be an INFJ?