[RHSeeger]

Out of curiosity, how are you defining the two? I ask because a lot of people tend to define them at "enjoys interactions with (larger numbers of) people" vs "does not enjoy interactions with (larger numbers of) people". The definition I like is that an extrovert gains (emotional) energy from interacting with people, while for an introvert those same interactions are draining. Both can enjoy the interactions, it's just a matter of how long they can sustain it.

[dimino]

I think of it in terms of energy gaining/draining, but I meant more from the "big 5" test perspective, as well as the other groups of personality tests you can take like DISC and Meters-Briggs.

In general I'm fairly skeptical of personality tests, beyond just intro/extro version, for the similar reason that a) I can test vastly different based on my mood and b) people tend to tie their self image to the results and you end up with a tail-wagging-dog situation.