Well I haven't been drawing much, but last night I was pretty bored so I tried to tone up my skills a bit.

First I drew the old version (obviously) and showed it to a friend who critisized the hell out of it, and so he helped me with a new version (just explained a few things to me).

So tell me what you think, what could I improve? Also, I'm still so sketchy with making a good solid line, any tips on how I can improve that?