Ok, you ready for some serious desktop pimpage son?
First up,
LITESTEP. Litestep is a shell that replaces your explorer shell, giving you a near unlimited amount of configuration of the GUI that is your OS. With thousands of themes to choose from, you can easily find one that fits your needs, and they were all designed for a purpose, be that minimal menus or eye candy. You'll have to register for that website to get anything, but it's worth it. I've been using Litestep for a few years now, and I'll never use Explorer again.
Next up, you can try out check out
Sysmetrix. This baby slices, dices, and tells you you are getting fat. It has all the information about your computer that you might need at any moment, plus it's completely customizable from graphics to functionality. There are many skins out there you can get for it too. There's even a litestep theme that has a matching sysmetrix skin
For themes, skins, wallpapers, and anything else, find it all
here. It's your one-stop shop for it all.
One other thing you
could do is patch your uxtheme.dll and get visual styles, though if you use Litestep the only thing it will change are windows. Still worth it in my opinion. You can get the visual styles at Customize.org too.