Murg... I hate it when I conform to a stereotype... but since my title pretty much says it anyway...
Geekdom:
-Played Magic: the Gathering competitively, plus D&D, Yu-Gi-Oh, and Pokemon
-Video game player
-Long-time member of choirs. LOVE singing!
-Played violin for a few years in school, plus took piano lessons
-Total anime nerd.
-Have been writing my own fantasy novel since I was 15.
Nerdery:
-President of the math club and the science club in high school
-Scored in the top 10 in the county in math every single year of high school from Geometry to Calc, including a 1st-place in pre-calc.
-Won two engineering competitions... one for building a trebuchet out of balsa wood, the other for designing a boat out of K'nex.
-IQ of 135+ according to every test I've taken. (My mom won't tell me the actual number that I scored, because she says that it would make me develop a superiority complex.

)
-Was an engineering major for most of my high school and college life
-Spent a good portion of high school writing programs for my graphing calculator. I even started programming my own RPG on it.
-Countless hours spent designing virtual roller coasters in No Limits Coaster, often using calculus and trig in order to do so, which not a lot of people do. (most designers just drag around the Bezier-curve control points.)
Not left-handed, though, and don't have ADD as far as I know. (That diagnosis wasn't popular yet when I was a school kid in early-90s rural Ohio, so I thankfully escaped it.) But definitely trans. The further in transition I go, the more and more I'm realizing just how bad I had it back in high school. It's a wonder that I accomplished all that I did considering how much emotional turmoil I was undergoing every single day due to gender issues.