KDE at least the versions I have used have a bunch of little annoyances that just break usage for me.
Mostly having to do with things like KWallet integration or other little pieces not working properly. I've used workstations that still run Windows 95/2000 for machines and they work great but KDE 4 leaves me missing its 3.x variant.
XFCE could probably be a viable replacement though, it is familiar and easy to use it just has its little gotchas as well (which are more annoying on a laptop than a desktop though).
Mostly having to do with things like KWallet integration or other little pieces not working properly. I've used workstations that still run Windows 95/2000 for machines and they work great but KDE 4 leaves me missing its 3.x variant.
XFCE could probably be a viable replacement though, it is familiar and easy to use it just has its little gotchas as well (which are more annoying on a laptop than a desktop though).