Like all the special snowflakes on this site, I'm an amalgam of 20something stereotypes that I selectively embrace. Take equal parts nerd, jock, hipster, and bro - blend well & strain out the chunks (the chunks being the shitty parts of all those types).
I operate in my own head most of the time but work as a sales engineer in the med device industry. People who know me well are shocked that I'm in sales, but it works out by virtue of most engineer-types making me seem like Dale Carnegie by comparison.
I try to ride that fine line between not taking life too seriously and actually caring about/taking charge of my circumstances.