I disagree with Moonglare.
Okay, so first the biggest issue is you like to really oversharpen stuff. Sharpen things and then go and unstrengthen (?) it, so that you're only getting about 40% of the original sharpen. It brings things into focus without giving hard lines that look bad. Next is color choice. You have to pick colors that are going to go with the render. Blue + Purple != Orange. They just clash way too much. If you work on the color the lighting would look better, but you also have to bring it down by about 40% because it is too strong as it is now.