I have a 1TB harddrive on my desktop computer that isn't doing much of anything, so I'd like to dual-boot something "interesting". Suggestions are greatly appreciated, so let me know what y'all find intriguing/interesting/frustrating/innovative.
The logo is just for attention, but EFF is a great cause that we should all support.
For a regular user, I'd suggest fedora workstation over Debian. Debian is old reliable, but the out of box experience for the user is clunky and missing some utilities and features. I had a tech friend of mine transition from windows and there were many small things that I hadn't noticed would cause problems.
I still run Debian on many different devices, I like it quite a bit especially when distromorphed with Kicksecure.
There is also Linux Mint Debian Edition which switches the base OS used by Mint to Debian. Out of box experience with LMDE is much more user friendly.