Definitely an introvert. I spent my teenage years interacting with virtually no one outside of my immediate family. Talking to new people was one of my greatest fears. Now I'm a little better, but I still prefer to spend most of my time alone, and I very rarely approach people in social situations. I also do not and never have had any friends, due to having been both homeschooled and a recluse.
But yeah I try to lean a little towards optimism.