I think you've gotten a lot of good advice already, so I just thought I'd add my own personal, introvert experience.
It took me quite the while to realize I was an introvert. For a long time, I thought I was shy (which I actually am, but this goes deeper). It wasn't until a few years ago that I learned it's part of who I am. I will never be the life of the entire party, but in a more intimate setting I can be hilarious and reduce people to tears (of happiness). When I feel safe, I can do anything. If I'm in my field of expertise, I can be more assertive than most and have no problems arguing my case. So being an introvert doesn't mean you will never be able to command a room or be the boss.
I've been in management for the past five years and I love it. It gives me the opportunity to have one-on-ones with people to help them grow, and that is so much fun. I can guide them on their way through their work life and perhaps even life. So don't think introversion is an obstacle. It doesn't have to be. That intuition is a powerful thing.
When I hire, I try to find a balance between extros and intros. We all complement each other and a good boss knows this. Though extroverts have an advantage in this world of ours, even here in Sweden (where most are more or less introverted...). So, my advice would be to find your field where you feel at home and a place to do it in. Then you will shine. It sounds as if you already know quite a lot about your preferences and strengths. Build on that and don't let the douchy extros get you down. You have so much to offer and if someone doesn't see what you've got, it's their loss.
Go wreak that quiet havoc!