I’ve been using Gentoo Linux for about a week now and I can say that I’m rather impressed.
In fact, Gentoo is a breath of fresh air for me, a (previously) die-hard Redhat (and then Fedora) fan.
Having to build your own system from scratch and then install exactly what you want is great. Compiling everything from source also gives a great sense of satisfaction except that you must be patient… but you get optimal performance in the end. Another nice aspect of Gentoo is that the downloadable ebuilds (sources + build scripts) are very up to date : Linux kernel 2.6, Gnome 2.6, KDE 3.2, Mozilla 1.6 etc.
So, for me, Gentoo is a winner ! I give it 10/10 :-)