I have a lot of qualities of essential "nerdiness", so I'll make it short:
I know how computers work, and how to run programs
I collect both CDs and records of older music
My favorite year of music is 1982...
Someone can name off a band/musician and I could name them either what Top Ten hit they had, or some stupid fact about them
I'm still good at Algebra
, History, Art, Literature, and English
I've never been to my prom (that's okay, my parents told me theirs sucked anyway)
I still love stuffed animals and animation
I still draw cartoons
I get excited if there's a program about painters on PBS
I looooveee old movies
And...
At one point, I could (and sadly I still can) can do the entire movie "Twister", line by line...
Edit: Even though I had the CD, I listened to Mirage with my old record player,
in its entirety. It may not be geeky, I just found that weird...