One of the reasons is also that geeks in general don't understand good manners. They view down to people with other interests (how many times have you read here on Slashdot some rants about how stupid people are because they don't know everything about computers), go on and on about their own interests (computers, programming, RPG games..) without even thinking if the other side is interested to talk about that. Geeks cannot grasp the concept of being and acting friendly to other people. It doesn't make only you feel awkward - it makes the other side feel awkward too.
well how about that ?