I echo a lot of the rest of you. I am insecure about my appearance. Some days i feel really good and then I look in the mirror and realize I don't look as good as I feel. My hair bothers me, it's all broken and raggedy because i play with it too much. And the main place I ever get fat is on my belly. Some women get it in their ass, in their hips, their thighs. Not me, I get instant beer gut if i'm not careful. It really bugs me because if I wear a form fitting shirt, I feel like I always have to suck in.
Also insecure about my past mistakes. I have some regrets and I wish a lot of them would just go away and never have the potential to come back and haunt me.
I am generally insecure after a conversation with someone where i did a lot of talking. I will go home and feel like I said too much or that I was boring them or talking too much about myself and not enough about them. I suppose this can be summarized into having an insecurity surrounding conversation.