Oh yes, a lot of my characters are a part of me, at least some parts. I do like to think that using parts of my personality as at least a base for my character's personalities would help me get more emotionally involved in the actions they take. On some parts, I even have a few that stem from my personality in full. Like one of my characters, Cerden, he's probably how I envision myself as an adult: sarcastic, perverted, but full of useful knowledge. There are several others, like one is severely twisted in the major degree. Like, killing for fun and all that fun shit.
So in short, yes my OCs have traits of my personality, at least in the smallest of ways. Some have it more than others. xD