Gonzalo - Yes. Also im not to keen on the hair can you try loose the white overlay and the bits sticking out and maybe add some streaks like highlights to the hair.
I also revised the nerd a little since I read you like to have streaks in hair and the idea of what it looks like as a skinny guy instead of my first one.
LOL! Nerd would never submit without the image lol. Looks good man like i say when i comment on more than one design people get a better understanding of what i am after.