KDE or Gnome

Suit yourself. Whatever appeals to you. Both are good. I myself prefer KDE. BTW, you can install both if you like and use whatever you find better for you. There's never an end to KDE v/s GNOME battle.

First-up is there actually a battle?
@Nishant: OpenSuSe has GNOME 2.12 and KDE 3.4 as well as a few other WM's .
If you are a newbie to GNU, i'd suggest you get used to terminal first. It is the Heart of GNU\Linux. Read the OpenSuSe userguide fully. It'll help you a lot.

I never worked more than 20 minutes continously on KDE, so recommending you GNOME will be much a biased answer.

Well, install both, work on both for a few days (Yes, I mean it, not a few hours, or it'll be too early to make a decision, like me), stick with the one which is comfortable to you.

Well, there is always a third, fourth, fifth... choices. Try Other WMs like XFCe, IceWM, Fluxbox, Enlightenment, etc too.

Try both..Use the one you like the most...I actually use Gnome..But I like afterStep as well...

My vote goes for KDE as it has more supported apps and now sports a kickass look. Gnome has also been upgraded but still it is very simplistic. Supported applications are fewer than KDE.

get with GNOME or any lightweight window managers...

Ya ...its true KDE has more apps...I love amarok..

wotever, if u haf enough hard disk space available install all the window managers as tech said. windowmaker's an excellant wm too!