I have a few distros running. Used to have Debian Squeeze/Stable on my Netbook, but i've made a full transition now to Fedora because on their next major release they're using MATE by default (!!!).
Aside from source-based distros like Gentoo & Arch (i love running a nice, snappy custom config), gotta say my favorite is still OpenSUSE with KDE Plasma. It's the best Desktop experience i've had with Linux.
If anyone needs help with anything, i'd be happy to help. Not an expert just a longtime user.