Lion Kimbro e-mails me. Film at 11. Reply right now, after the break.
Some people say it is the packagers' problem.
Common look and feel, for example. It will not work as a standalone. AfterStep, Windowaker, IceWM, Enlightenment, etc. KDE has a sharper, more well integrated desktop. But we need to be as easy to use as those other popular DE's.