I'm typically more introverted, although my job requires a great deal of interaction with other people. I do struggle with assertiveness and confrontation at times, but I think I've been able to overcome alot of that in recent years. I grew up with very loud, outspoken people so I think that's where I get my introversion from.
My husband is a tough one to peg... He's definitely quiet at times, but can also be very well spoken and confident. I would think he's introverted by choice, unlike me who can be introverted because of discomfort and insecurity.
My boyfriend is a University Drama Major so one guess what he is :P He's a very likable guy, gets along well with all kinds of people.