Great to see you here! Welcome the to the Mint Forums, and belatedly, to Linux Mint!
I am a big fan of Xfce, too. I really like the simple, clean interface, and the ease of customization. I recently switch to MATE, though, when I inadvertently found out that Caja (Nautilus) gives you the ability to do tabs, and some other things that Thunar won't do. I know you can add Caja to XFce, but the Mint XFCE already has a lot of GNOME-ish things anyway, and with adding Caja, I didn't see much difference in just going to MATE, which is also easy to customize.
I hope you find the Forums rewarding!