Improvment?

I've been wanting to do this for a while so, there you go.
I tried chosing one of the best drawings I've done from each month, so I can compare my first drawings on DA to me newest ones. The first 4 look a bit more messed up than usual, cause I have to make them bigger. Since I used to draw realy small drawings. Also I used to draw with Paint only, before I got Gimp.
And these are only digital drawings.
Anyway, I think I've made some improvements What do you guys think?