I confess that I clean frantically before my flatmates come home, or anyone comes to visit so people think I am super clean... which I am so not.
I don't like people watching me eat, or eating something that someone else has made (unless it's takeaway but hate eating in restaurants). People try and be nice and say "i'll make you breakfast" or something and it's a nice thought and all but I hate it. It makes me so nervous and uncomfortable. Same with people being in my room... same feeling.
I confess that I occasionally write out notes before I phone people because I get so nervous. On that topic, I confess that I don't only ignore withheld numbers, but any number I don't know. If its important they'll leave a message.
I confess (and this is something I do all the time) I ask questions I already know the answer to just to try and make friends, or make people feel like they know something more than me. Or to fill the silence.