Nerd?

I've been called a nerd. Hell, I even called myself one in a self-depreciating way but now I'm pondering about the true meaning behind the word.
Speaking from my own experience I do not see it as a derogatory or insulting term; it is just a word that means that you have your nose in your books any moment you can so as to quench your thirst for knowledge. OK, very romanticized, but you get my drift.
I got a very good grade in my exam, and I guess this is where all of this is coming from. I study every day, every time I get (when the neurons are awake), and so I deserved it. Not a perfect score because I made stupid mistakes, but who doesn't.
The whole point is that I wasted a big chunk of my life in just getting by, and now that I've found what I want to do I am investing as much as I can in it. Sue me, so a nerd I am.
I will continue, and will laugh with those that think I make too much of it, all the while patting myself in the back as I remember that I am doing this for me and no one else. And the rewards I get? They will be well deserved.