i think this would belong in the distribution forum...
but short and simple:
mandrake, easy to use/install. very newbielicious.. its attracted by newcomers to linux due to its ease of use and configuration.
suse, great distro, lots of good documentation i think, pretty fairly easy to use/install. lots of programs come along with it as it has one of the largest installs you can do. i think it can come with over 4 or 5 gigs worth.. someone correct me if i am wrong.. haven't used since 6.4