As a huge Nirvana fan, you can probably imagine that I really like and appreciate this, haha.
To me, the oil paints give this painting kind of a dark touch to it, like some of Nirvana's music. Good choice of materials.
The only thing I don't like is how you painted some of his hair. I can tell you were making some of it look blue because of the lighting, but it just didn't turn out well at all. It looks more like some of his hair is actually blue, not just the lighting.