At less than obscene resolutions, I greatly prefer monochrome fonts over smoothed fonts, which look blurry to me. Whenever I'm running at 200DPI, I'll switch to subpixel anti-aliased fonts.
Windows gives me the option of having incredibly readable subtly smoothed monochrome fonts and Linux only lets me have smoothed fonts. This is one area (the only area, I admit) where Linux is less configurable, or at least has less worthwhile options than Windows. But text readability seems like the single most important issue to me in an OS, so I have to stick with Windows until I find a Linux kernel recompiled for better monochrome fonts.
Or I need to download a pixel font for all the standard web and system fonts, but copyright makes that illegal and impossible.