Awesome job on the hair, I love the look of it. Gackt begs to be drawn doesn't he ^^ His whole attitude is fascinating in my opinion. And I adore his voice. This painting really looks great, especially since it was your first time working with this paint. Very impressive.
It looks like water color. Did you use like, professional paint or that craptastic crayola shite? I was never exposed to tempra in my art classes, so I'm not aware of the kinda of brands that are out there (other than said crayola brands I was always forced to use)