In the past, when someone asked me, what Linux distribution should i used for someone like me (a beginner), i would say Ubuntu or OpenSUSE or Mandriva because they are user oriented distribution that are focusing on common people compared to other Linux distribution.
But if you asked the same question to me right now, i would say Linux Mint is the definite answer. Looking at how they evolve this past few years, Linux Mint gained lots of user base recently, mostly after the release of Ubuntu 11.04 since they constantly changing their products with new features that (i think) is too premature to be used in desktop environment. Most users doesn't need radical changes just to enjoy a nice desktop that is fully working out-of-the-box. This is what Linux Mint gives to their users: a working system out-of-the-installation that is easy to use and very user friendly with a nice and consistent graphical interface, something that Ubuntu is lacking lately.
Anyway, this doesn't mean that i'm abandoning Slackware Linux as my primary operating system. Slackware still remain my favorite operating system and i will continue to use it as long as it's still being maintained