Thanks Xion
I made an update, it's not much but it took me quite some time to get things right:
1.previous sprite
2.updated version, tried to get more unity in it by mixing the colors so the shirt and the pants would blend a little.
I also made some changes to the reflection of the light, it isn't focussing on 1 spot now.
3.darker outlines
4.darker outlines and inlines, I don't like it but I post it anyway
5.mayby this looks better?..
6.an update of 2, updated the inner lines a bit. also editted the lightsource on the leg
I hope I fixed the things you all pointed out
Right now, the sprite has become a pretty complex, it looks good but it may be difficult to animate it like B.O.B. said earlier. I'm still going to try to animate it even if it stays complex, it will cost a lot of time but it's worth it. If it won't look good I'll try to make the frames more simple, maybe that will work.(so, keep the stance frame as it is and make the walking frames simple)