Whichever you choose, Linux is the easiest to use and manage but here is a bit of a comparison.
Linux is the easiest to use, I find Slackware to be the best (
http://www.slackware.com)
BSD's seem strange to me, but the main thing is that BSD's such as FreeBSD (
http://freebsd.org) are HARD to setup, it is text-based and complicated, where you have to manually edit many things and configure a kernel.
Whilst Slackware is a snap to install, the Setup program is simply straightforward and there is plenty of documentation, such as
http://www.slackbook.org or user created ones like
http://insyte.uni.cc and
http://shilo.is-a-geek.com Even though it is text based it is not hard.
Package management is easy with Slackware,
http://linuxpackages.net has a huge archive of software to download, and you can intall it by just invoking the command:
Code:
installpkg [packagename].tgz
As far as I know there is no FreeBSD or any other BSD Live CD, yet for Linux there is plenty, go to
http://slax.org for a Slackware based Live CD.
Hope that gives you more info.