DistroWatch.com: Put the fun back into computing. Use Linux, BSD.

The bewildering choice and the ever increasing number of Linux distributions can be confusing for those who are new to Linux. This is why this page was created. It lists 10 Linux distributions (plus an honourable mention of FreeBSD, by far the most popular of all of the BSDs), which are generally considered as most widely-used by Linux users around the world. There are no figures to back it up and there are many other distributions that might suit your particular purpose better, but as a general rule, all of these are popular and have very active forums or mailing lists where you can ask questions if you get stuck.

Choosing a distribution is not an easy decision, the best path is really trying out first. Still forewarned is forewarned and these reviews give the important information about distribution suitability for different purposes. Well worth a read.