I agree with Raz's perspective on this.
I'm usually reserved when amongst idiots (I'm often reserved), but around strangers I don't really freeze up so to speak. After all, I have worked in retail.
Amongst friends however I'm usually the most outgoing, first to laugh at a joke (first to tell one) first to agree to some hair brained scheme that is not likely to result in immanent death etc etc.
I've know a few nerds in my time and I can truthfully say that their manner is utterly intolerable. They become fixated on one thing, and come hell or high water not for a Mac would they deviate off the chosen topic.
It becomes most frustrating, especially when you realise that they are not going to wake up to the fact that there is more than one discussion going on in the world.
Geek: So are you going to get a new motherboard for your Duel-Core yet?
Nerd: Nah, I'm formulating a theory on what the best possible combination of skills for a Barbarian of the Northern Kingdom {Pause - that "Northern Kingdom" bit is important to him - End Pause} is in Diablo II: The Lord of Destruction. You play a Barbarian right?
Geek: Yeah I play a barbarian, are you going to the fund raiser this weekend?
Nerd: You see... the problem is that to work out a theory of even some validity I would need to spend hundreds of hour exploring all possible paths, since charachter development is such a lengthy and complex cycle.
Geek: Sandra will be there...
Nerd: But I'm determined to make this contribution to the community of DII:TLOD! {Pause - That "T" in upper case is also the stipulated dogma of the said nerd - End Pause}
Geek: Aren't you gonna miss your bus? Shouldn't we go the other way Harry?
Nerd: I've already decided to take two years off after school for the project, then depending on it's success (of which I am certain) I will branch off into the workings of the largely under-valued Holy Paladin. Now the Paladin is-
Geek: Harry! Wake the **** up!
That is my experience. They may be nice people even, but damn they go against my grain like bark against wax.
Irritating buggers.