One of the more common disappointments reported about the Linux GUI is clunky fonts under X. While it's true that they can look pretty rough out of the box, it's also true that sharpening them up is easy and well worth the effort, thanks to MS TrueType fonts and the open-source FreeType project which makes them useable on Linux. What follows is an explanation of how to tweak them, assuming KDE is your desktop manager. (I imagine this may work on other desktops, but KDE is the only one I'm well acquainted with.)