When I tell someone my nickname is 'Superquad,' I usually get a confused look because most people are unfamiliar just exactly what a 'superquad' is. In high school, I was in marching band. I played drums. I marched playing snare drum my freshman year, and I quickly learned to play a set of drums called "quad-toms" (or "quads" for short). Everyone in band with me knew I had a love for comic books and I had a friend who said that I "was the best she had ever heard play quads" and she gave me the nickname "Superquad." (Some simple mathematics:)
Super + quad = Superquad (see photos below)
My friend told me that she made up this nickname from my percussive ability, the instrument I played (the obvious part), and to reflect my hobby (comic books). Although the picture from my youth can be a bit misleading (I never was a huge Superman fan; I like Batman a whole lot more), everyone latched on to the nickname and felt it was appropriate. Henceforth, I have been called "Superquad."
I also thought the name was clever, so when I had to pick an on-line persona, I stuck with the nickname I had already been used to.
I am also very visual, so to share a few more things about myself with you, I thought I'd use a photo album of sorts (with a few blurbs):

I'm a drummer!
I am a percussionist.
I am a student.
I am a Christian.
I am a husband.

I am an actual, emotive, person.