My favorite UNIX like OS is FreeBSD. I like FreeBSD because they build & maintain the entire OS from the kernel to the userland. It isn't broken in half like linux is, technically linux is just a kernel, and the distro is a set of of apps (many of them 3rd party) that uses the linux kernel.
I'm also a fan of all the linux distributions that have been around for the past 10 years, in particular: suse, redhat, slackware, and debian.
I like any linux distro that doesn't install a load of bloatware.
I always thought the idea of using linux is to learn the UNIX operating system. It is no replacement for Windows for the average desktop user, not yet atleast, after 10 years of using UNIX, XWin still sucks.
Instead of distro hopping, you should pick one, and learn to configure and tweak it to your liking and gain a better understanding of the UNIX OS. If you're not doing that, you might as well be using windows.
here's a project for the newbies:
install linux with bare minimum packages, no XWin, just the base files.
download and compile XWin and then run the setup utility.
learn how to configure, customize and compile a kernel.
secure your system. edit the startup scripts to only load the programs and services you need on bootup.