What a great word. "Cycle." That definately describes pretty much my life, Anomaly. Whenever I am with people for too long, I need time to think alone (like any introvert). Then I find myself overintellectualizing about everything - life, society, myself, etc. It's really depressing and I get angry at myself about it. After a while I find that I'm just slowly dying on the inside with all of the sad thoughts and go out with my friends or something to try to forget about it. Then I need to be alone... and the cycle repeats. Any other INFJs feel this?
To answer the questions from the original post:
1. I'm not sure I ever show anyone who I really am. Maybe if every single person I've ever talked to in my entire life got together, they could possible piece things together. Typically, I am very serious and quiet in school, and around people I do not know well. I'm also quiet in groups, even when I know everyone. As for my family... well, I'm actually kind of distant from them, which might seem opposite from a normal INFJ. I live with a bunch of extroverts (as far as I can tell) who can't even understand that I'm an introvert, so I don't expect them to even try understanding me completely. Around very close friends I can make jokes, but sometimes I feel like I'm not even really myself around them... I don't know. I don't think I've ever actually had a "close" friend, by my definitions at least.
2. I can be many different personalities. It's a bit ironic for me. I can't act in front of a camera, but in real life situations, I'm just fine. I know it might not always be a good moral decision, but sometimes I might act innocent so people will be a bit nicer to me. I've always been kind of good at that, but maybe that's because part of me truly is innocent. =P At other times, with some close friends, I can make sarcastic jokes, which I wish I did less. Sometimes they slip out around other people, but some don't even recognize the sarcasm, so they believe what I say. It's kind of weird how that happens. I guess it's too hard for them to think I'm lying, because I try not to whenever possible.
3. My favorite "mask" to wear... is probably my spontaneous one. Unfortunately, I barely ever use it, so it's kind of dusty. I have bad allergies with dust. =(