I like KDE and GNOME so I dual boot my laptop with 500G HDD
250GB for Ubuntu 10.04 with GNOME
250GB for openSUSE 11.3 with KDE 4.5.1
They are both good
I'm the opposite.
I far prefer KDE/Kubuntu over Gnome/Ubuntu.
All OS's have bugs and require tweaks. The more you do and the more complex stuff you try to accomplish, the more tweaks you will need.
I have Windows 7/Vista/XP, Mac OS X, Ubuntu, and Kubuntu on my 8 home computers. I end up using Kubuntu 99% of the time.
It helps to RTFM. That's why I use Kubuntuguide.org.
I have a bad habit of using beta software and then getting upset when it doesn't work well...
I was using Xfce4.8-devel and got sick of crashing the panel. For a long time I was using Compiz-Standalone, which was great but had a few niggles to deal with (emerald needing to be restarted sometimes, bad sloppy focus policy).
Now I'm back on Openbox without compositing and it's fantastic.