My Head
 

This I think is my final draft of the front look of my head. I plead for any critiquing! Thanks!

Looks pretty nice but you could improve the skin and hair shading a lot

Explain...

mmmh, don't know if i could explain this in english but i'll try.
if you want your head to look realistic you'll have to draw them with several shades of orange. Do you know what I mean? The face isn't lighted everywhere the same way. Neither the hair is.

I hope I helped you :/

Go to http://tinyurl.com/tutopixelart if you still have some questions

It is too small to critique :(

Click on it. It enlarges the picture. It looks good, But the mouth needs to be more contrasting with the face. (Stick it out more).

OK!!! So I finally found enough time to finish him! I made him bigger, more detailed, and added better shading/ hair consistancy. :D

Hellu! I've seen you improved your head dude, but you can still improve a lot of stuff:
_Your hair doesn't really look realistic, you should look at a pretty cool tutorial on deviantart about pixel art hair.
_you can shade your skin a better way, I've seen you drew the shadow of your hair on your forehead but it's not enough, you can enlighten the side of your nose and your upper lip, add a darker shade on your cheeks, your lower lip and the inside of your ears. If you do this, the mouth will look way more realistic than a black line.
I hope I helped you, I'm showing the newest head I made in case you would want a model. It's not the best head ever but it is the best head I did make.