Red hat 7.0..upgraded from 6.1 which was my first foray into linux. I loved red hat 6.1, but I am in lust with 7.0...much lighter, faster, many quirks about 6.1 fixed in 7.0 (not bugs, just strange ways they made things behave, like now you can turn off the "you are logged in as root" warning, and version 7 does a much cleaner job of setting up PPP internet accounts)
I like sawfish better, and some otherthings as well.
I have heard that it is buggy, and they do have a few bug fixes now available, but I haven't seen any evidence of bugs, just operator errors/ignorance on my part
I also found red hat's documentation to be very complete, easy to find at their site, if you didn't buy it in a box, and the documentation is very easy for a newbie to understand.
I looked at the web sites for a few other distros and I wans't impressed with the documentation at all
red hat 7 comes with xfree86 4.0.XX as well..which is a big plus