you could try Trinity Desktop Environment
in a nutshell, it is the good old KDE 3 started by Timothy Pearson (and meanwhile developed by a wide community of ppl like you who don't like... well the alternatives)
TDE's homepage http://www.trinitydesktop.org/
one of the most important improvements TDE did was to switch over to Qt 4 (Qt being the API on which KDE is build; Qt was originally created by Trolltech; the official Qt 3 was not developed anymore and in order to remain able to continue development, TDE upgraded to Qt 4 (which obviously is KDE 4's primary API))
personally i started using openSUSE (with KDE 3) as my primary OS 5½ years ago (when m$ v!$t0 came out) and never looked back. as openSUSE was also one of the leading distro for the KDE 4 development (11.0 was the 1st mainstream distro to offer it as an option & made it its primary DE with 11.2.
by that time, some ppl in the openSUSE community decided to use TDE's source code to maintain KDE3 next to 4. since openSUSE 12.1, KDE3 is again one of the DE offered as an alternative even though it isn't included in the DVD's yet.
have a look at http://en.opensuse.org/KDE3 to see how you can (easily) install KDE3 on openSUSE.
alternatively, you can download a Kubuntu Live CD from TDE to have a look at it
http://apt.pearsoncomputing.net/cdimages/
it also offers the option to install it to your HD if you like to try it further.
if you already have a distro setup (based on Debian, buntu, RedHat / Fedora or Slackware) you can add the TDE repositories and add the DE to your current setup from http://www.trinitydesktop.org/installation.php
if you decide to go the openSUSE road (which i strongly recommend; the buntu crap is... just that & the deb package management a calamity) and run into any snatch, feel free to ask a question here on Y! Answers; i'm usually checking in every day or two...
EDIT: TDE, KDE, Gnome & Co are NOT operating systems but Desktop Environments on top of the actual OS (GNU/Linux); not liking KDE4 or Gnome 3 is comparable to the general public's aversion to the m$ v!$t0 interface, reason for which many ppl (& companies) remained with XP for so long;
the actual problems of NT 6 (the OS version of v!$t0 as opposed to NT 5.1 for XP) is not relevant here as the kernel version (either 2.6.36 or even 3.0.1 for openSUSE 12.1) is perfectly up to date & safe.
again, openSUSE was the 1st mainstream distro to offer the 3 kernel (with 12.1)