It depends what you want to do with Linux, each build if more suited to different people.
Easiest to get running is DamnSmallLinux, because it's just a case of downloading the 50MB CD Images; burning it and your good to go; but you can pretty much forget about doing much past simple things.
SuSE is the easiest to use once installed, but updating anything major is a pain in the arse,
Gentoo is pretty straight forward but takes hours to install new things; and was like just over 28hours to install it on a Pentium4 3.2GHz HT, so not exactly a 'quick' solution.