I'm a big nerd - really big, and though it is a huge part of who I am, I refuse to fit into a stereo type, and can fit in most social situations without feeling awkward.
I'm a touch shy and sensitive, but I love to laugh and will often joke with others about anything and everything. My sense of humor can be very dark, so I do caution you to step lightly.
Don't be fooled though, I know how to be serious when the time comes. I am an adult, and am quite capable of acting as such.