inspired by the computing page of rms
My librebooted ThinkPad X200 computer is the machine I use the most and where I do most of my computing. I also have the privilege of having access to a fleet of servers through our school's Computer Science Club that I use for some more computationally intensive tasks every now and again.
I used a wide variety of distros over the years; but I have since found Trisquel to be my favourite and it's put my "distro-hopping" days behind me. Sometimes I pair it up with GNU Guix. For the kernel, I usually use GNU Linux-libre from jxself's APT repository.
I spend most of my time in GNU Emacs.