Is it weird that I can analyze myself?

I don't have extensive experience using my analyzin' skillz on others, but I constantly dissect the why of my words & actions. I can figure out which insecurity, struggle, or scar is fueling my tug to say or do something. Obviously, this isn't perfect and foolproof because there's only so much one can know about her own subconscious.

For example, I'm extremely biting and sarcastic around guys. I give off that "mean vibe". I know this because I did that just today--drove someone away with my dry humor.

It's from my insecurity and low self-esteem. Why would they like me? How can I make this guy stick around? So I try to enhance what I think is attention-getting about me: sarcasm and wit. It gets to be too much in large doses and therefore, my ex-boyfriend accusing me of being mean.

Yet I'm so shy and nervous inside. A chestnut with burrs. But I can't explain this to people...

So is this normal? Do other people do this? I have no idea.