Straight eyebrows and lower lip don't compliment the curvy eyes and mouth. I'd either get rid of them or change their shape to match the curviness of other features.
Also, the perfectly oval mouth looks out of place next to asymmetrical eyes.
Try to give it something that sets it apart. Maybe ridiculously huge eyebrows and beard, or raise the whole face up to make the head look fat, or make all facial features small to make it look funny. Something to make it look less generic.