@mimilove4:

I also use old papers for drafts or prototype character design. And when my eyes are satisfied with the character, I put it on a clean paper.

I totally agree with TrinityLight!

(Hahaha, I draw on the back of used paper too! The difference is, is that I use old paper when making rough sketches :P)

i like your line art it has simplicity yet it's just so good.