I have had many people email me about the best distro out there. The only answer I have for them is “depends on what you want to do”. I have spent sometime working on a list of Linux distros and what they are good for. More here
Debian – My day to day OS. Debian is one of the oldest and most stable distros around. The core to a bunch of other distros like Knoppix and Ubuntu. If your looking for something that will give you no headaches and carries a very stable branch of applications, Debian is the distro for you.