I would categorize both my kids as extroverts. My DD5, more so than my son. When my daughter was younger she was very quiet and sensitive. She's still very sensitive in some situations. But she's very social with everyone. My DS9 often has older kids over and my 5 year old can be heard ordering them around. She's the only neighborhood 5 year old at all allowed to hang and contribute to this little group of kids.
My son gets a little more buried in his projects, but would still prefer a social outing to doing school work any day of the week.
