it really really really does not
matter which one you use, like, prefer or like to watch at 24/7. you can use both kde and gnome apps in both of the things, and both of them provide the basic operations
like a text-editor, a calculator, wallpaper, panel etc. etc...all the eye-candy and helper apps can be used no matter which one you use.
I myself prefer Gnome for it's beautiful and easy to use, not made too complicated for daily use (console is for those freaks like my dark side who like complicated things), yet giving me every basic tool I need..but still, I prefer k3b as my cd/dvd-writing-app, and I don't care a damn if it's a KDE app. It works, it's good, that's it - and it works under Gnome peacefully.
So when selecting between KDE or Gnome, bear in mind that all the apps out there will work (ok, probably: there's always an exception
I know there is or will be at least) in both of them, and they both work with the Linux you have..so I guess the reason(s) why you select either of them, are
1) which outlook you prefer - both look good, but which look do you like to look at?
2) do you have a fixation on Qt or GTK..
3) simply, do you WANT to see the FOOT or the K?
also remember XFCE...looking Gnome, having less weight