Sketches on graph paper, lol. Math. -shudders-
If I had one of those sexy 2d dolls, I'd grab her too. ;3;
I think if you lightly shade it, it should be fine. just toss a few diagonals in and bam, more volume. Just like a hair product. é_é
No but, you certainly have more creativity than me, lol. My sketchy lines turn into squiggles of doom, but that's another story. x_x