Eh, depends what you're drawing. If you're doing anything except animation, or like, cartoons, you can just be really good at drawing by eye and that's enough.

Eh, depends what you're drawing. If you're doing anything except animation, or like, cartoons, you can just be really good at drawing by eye and that's enough. Anatomy can distract you from what's actually going into your eyes. If you're doing oil painting, for instance, I think you'd be better off doing a bunch of interesting (glossy, translucent, refracting, etc) object studies.