Welcome & ask away!
Five years -- it's as long as I have been using Linux exclusively. Jaunty Jackalope is what I cut my teeth on, at first. After that, it has to have been more than 50 distros that have been tried.
I owned eight 3.5" hard drives at one point and would swap them out of the old Shuttle KPC and install a distro on each. This made it handy to distro-hop. Some distros I did not care for and immediately got rid of after first boot-up and attempt to upgrade; other distros I used for a week or a month or two and then went to something else. Doing so taught me a lot.
One thing learned is that I prefer Debian and Slackware over Redhat or Gentoo (although I do like Scientific and Sabayon -- just not enough to use them regularly). Puppy is my failsafe distro -- for use on most anything. AntiX is the most versatile, as far as platforms go, distro that I have tried.
Currently, I am using Mint17_xfce_64-bit and Salix64-Openbox-14.1 (very nice, very lively). I just replaced KaOS, which is a KDE distro using strictly Qt libraries and software. I found it attractive but a bit too slow and cumbersome for my preference.
Explore!