I don't think I have high or low self esteem. I'm just me. I have traits that correspond with low self esteem, like shyness, but I don't have them because I think I suck, but then, there are those traits I -do- have because I worry that other people find me irritating and a burden to be around. I also have a pretty poor opinion of how I look. However, I also have traits that correspond with pretty high self esteem, such as my openness with others about myself, and I'm highly socially adept. Like all humans, I'm complex, and crude generalisations don't really work on me.
Sophisticated, classy generalisations totally do though.