Intimidation

Do I intimidate people?
This is a very important question that needs an answer!
Please, feel free to comment on this subject. I'm encouraging it.
I don't think I'm intimidating, I can't figure out why some people might view me that way, but perhaps they do.
I tend to be very quiet and reserved, and I'll be honest, I'm very very shy. I guess that could be interpreted as being snobby perhaps, but I really don't think I give off those vibes. I'm normally very friendly even if I'm not all that out going and talkative. I smile when I see people, usually as a form of greeting, and I tend to show genuine interest in them.
Perhaps it is my sense of humor. I can be a little sarcastic, and enjoy a little dark humor once in a while, but that doesn't really mean anything. If anything it shows that I'm a little more grounded than most people at this school. Besides anyone who knows me knows I do tend to be a cheerful and slightly optimistic person.
Maybe I come off as being a real smartass. I do tend to show it off a little when I'm very knowledgeable on a certain subject. I just like to share what i know with others.
I never stressed out over this topic before, but the wonderful LG had to suggest the idea that I might be found intimidating to me a little while ago and now I'm obsessing.