So, what distro(s) do you use on your primary system(s)?
Gentoo on my file server Trustix on my web server Fedora Core 3 on my Oracle 10g database server and my Oracle app server
I like Gentoo's "build your own" style but didn't have time to rebuild it on my web server so I went with Trustix. Fedora Core worked fine with the instructions for Oracle and I didn't have time to play very much with the Linux part of that install.
And when I have some more time - Linux from Scratch!