If the packages are available to you and you have sufficient RAM, jump into a totally non-GNOME experience. Give it a whirl. If you liked KDE 4.3, you'll love KDE 4.4. If you didn't, then let this release try to convince you.
Who knows, you might just like what you see.
KDE 4.4 will undergo its beta freeze near the end of November, and by the first of December, KDE 4.4 beta 1 will be ready for testing. If you are unsatisfied with any aspect of the desktop environment at this time, or find bugs and glitches, report them and we pledge to make KDE 4.4 as high-quality as possible.