Hello people, I'm always looking for ways to improve my art, and I would appreciate it greatly if some of you could help me do so.

 So, what I'm looking for is critism on my art.  Ways that you think I could make it, and my future art, much better than it is now.  That said, I'll post a few of my best older, and newest digital pictures, and I'll probably be posting more as it goes along.  I might post traditional too, I'm not sure yet.  Anyway, here goes.

Best Oldest:

Newest:
Done yesterday, April 6th 09

Started and finished today, April 7th 09

What I see at first glance is, that the backgrounds of the first two pictures are too.... hm.. chaotic. The view of the one who looks at a picture is confused, because the highest contrast and density is in the background not on the ob
ject. More calm structures would be nicer here^^

 Second is, that you tend to use full saturated colours (I know this problem very well, since I am struggling with it myself XD). Helpfull is here also the "Colour Theory" article of wikipedia.

Hm, any tips? shade with more colours, shadows are usually more blue and dark brown than black^^

I hope this wasn´t too "hard", it is just what I would criticise so far. Keep p the good work, since your sense for poportion is pretty good!