My biggest faults are my low self esteem and insecurity.
A lot of times, I tend to not look at myself as the greatest, and oftentimes I compare myself to people that are more skilled at things then I am and it makes me feel depressed to the point that I often lost motivation for things I like. (Like drawing and writing.)
I'm also very conscious about what other people think about me, and I don't want to be looked at as a idiot or a jerk or something (Which ironically is making me look like exactly that.), and I also don't want to take risks, Always fearing the worst case scenario and basing my actions around that and what can I do to prevent it. (This is why I tend to delete some of my threads a lot of the time.) So a lot of times, I do things that I either didn't have to or stuff that will make people look at me badly because of it.