While I love my glass top desk, I'm really into the simplicity of a white desktop, because there's so much you can do with it. Add a DIY dry-erase board, a messy inspiration board or a vase atop a pile of your favorite magazines for some added color.
Here's a little bit of office space inspiration, along with a few white desks (ranging from cheap to super-pricey!).
Photos from ikea.com and pbteen.com.