Wel I have used XP, 98 (im using now), ME, 95, 3.1, 2000 and the most superior is.......  Win 98.  I find Windows XP is WAY too graphical and colorful.  Basically it is for the absolute begginer in the Windows OS, with all there help features and what not.  Windows 98 may cash often but at least it is simple and easy to use.