This is my second digital painting, done with Wacom tablet. I know it's not perfect because I am just a beginner in digital painting. The hair sucks and I am still looking a better way to do hair in better way.
This is actually pretty amazing for a second shot at digit painting. There are certain brushes that are awesome for hair, if you are looking for a more realistic strand by strand look. I'm not sure which version you have but I have CS5, and I use "Round blunt medium stiff", "Round fan staff thin bristles" for general strands and a pen pressure standard brush for volume effects. But keep at it, you're doing great!