Centos?

[dale]

I use CentOS on my server. It is good.

[makentosh]

Servers running CentOS distribution is I think the best. It not a RHEL based distribution but it is somewhat the same only to think that RHEL needs licence. I have been using CentOS for a while and I love it.

[Famous]

I use CentOS for everything, webhosting, to resell the server, and also to use it for seeding torrents and more...

[Alex Moen]

Another vote for Centos... Been using it since version 4, now running 6 on many, many servers and VMs. Stable, reliable, well thought out server platform without all the desktop and graphical fluff by default (not that you can't add it all, though).