I love people and hate crowds. I can speak to a crowd but would rather talk to a person.
If I were to meet you in person our conversation would start with me asking you where you are from, what high school did you attend (and what was the school's mascot; a mental collection/hobby for me). Teens and such get the obligatory "what are your future plans" question with a couple of twists.
"What do you want to be if you grow up?"
"If I grow up?"
Bam, conversation is now under way.
If they answer straight after missing the "if" I then ask them if they know why old people always ask young people that question. "Cause we are still looking for options."
Either of those will usually draw the introvert out to play. Mostly it is just asking them about them. It helps that I am fascinated by people in general and love to hear their stories in particular.
We volunteer at a bible camp. One of my favorite things is asking people how they got involved there. Each person is a part of the camp's history and part of His story.
I also love the "small world" game. Finding out that a person you just met has some connection to your life through some other person or ministry.
While I am prone to the reflection/introspection spoken of in the link, I hate to be alone. This is more related to activities. Fishing, hunting, ball games, walks and such are no fun for me if I have no one to share them with.
I don't know if I am an introvert or an extrovert. I do know that I am one of a kind and fit few if any "normal" molds.