About Suse 9.1, if you want KDE go with them, they actually employ people to work on that desktop environment

The only problem with it is that either you buy it, or you have to do an FTP install (which is not so much of a problem, IF you have a great big pipe sucking the life out of the internet).
About Mandrake, that\'s what I use and of course I\'ll be biased and say that it\'s absolutely wonderful

The URPMI system is really your friend, and the amount of alternative repositories out there, with interesting collections of software is very, very extensive. I should probably add that Mandrake has been my distro of choice since two years ago, when I installed 8.2. Haven\'t looked back since

Currently on 10 Official, waiting for 10.1 Community Edition to be released to the public.
About Gentoo, that system is quite simply not a beginner\'s system... Very powerful yes, but not exactly simple... Also, it has gotten quite a bad reputation due to it\'s apparent l337 status. It has even spawned this site:
http://funroll-loops.org/ that rips the p*ss out of the sadly large part of Gentoo users that have little clue about just what makes Gentoo good. Please understand that I\'ve nothing against Gentoo as such, it\'s just not the optimal beginner\'s distribution

So, in essence, my suggestion for a distribution if you just want to use it is to go for Mandrake, and suggest that you use KDE, since that\'s what I know and have grown to love muchly (it is no longer the nightmare of usability it once was, I should add). As for some ideas for what to do in KDE, try this on for size:
http://wiki.kde.org/tiki-index.php?page=Fun+Things+To+Do+in+KDE