Hahahah! Let me share my experience --- I started with Draw a Box back in August, and went all the way up to the 250 box challenge. I think I drew about 100 boxes, but --- I got bored. So, that's exactly what I did. I took Proko's basic figure drawing, a few more classes, and then advanced figure drawing and I'm back. I can do gestures, bean, robo-bean, even boxes, but when we get up to structure and interlocking forms?? WHOOPS!! Huge struggle. You can't do this if you can't draw a box and draw it well. Effortlessly. I'm back. I'm probably a little better than when I started, but I think that I would have had an easier time of it if I stuck it out here.

But... Let me add a bit of wisdom that I learned along the way. When you practice, you want to do both... highly technical drawing AND gestural drawing. Draw a couple of pages of boxes and then do some 30 second gestures or 1 minute studies. Have fun. Play. Do both things.