Nice effort, but I think the eyes look cartoony compared to the rest of the character. You shouldn't use such a dark color directly next to the white of the eyes; perhaps you could use a lighter color there to soften the edges. Same with the nose and mouth, but it's more noticeable on the eyes.
There are also jaggy lines here and there, such as the dark edge of his left cheek.
You're welcome! Forgot to mention that the lack of eye shading also contributes to that cartoony look.
I've seen some of your other Street Fighter portraits and they're pretty nice.