Since it came up on Hacker News I thought I can write a little bit about that topic as well.
I started to look for alternatives to the distribution default desktop environment relatively soon after arriving on Linux (Fedora if I remember correctly). At that point the options included Fluxbox and a couple of smaller ones like I3 and wmii. I also tried twm, but honestly, without any effort spend in themeing that was basically not really viable.
So after Fluxbox, which was great, but still leaves you with too much to do with your mouse, my conclusion was that I basically don't need a regular desktop. Having all those messy icons, menus, widgets lying around the screen is just way too distracting for me.
If you then remove all that decoration, you are left with a very bare bones look. Still, after starting to get the hang of Vim (with which I started) and later Emacs, the disadvantage of constantly having to deal with window positions became apparent.
I think the next step was to use wmii or one variant of that. Tiling leaves your mouse free to interact with the main point, your running program. No more juggling windows, aligning borders and so on. For me this isn't about a pretty and flashy screen, it's about the most comfortable environment to work in.
To the present day: I'm no converted to dwm from the awesome people of suckless.org. It's basically a single C file, you configure it with a header and additionally with a custom patch set and that's it. You'd be hard pressed to find a smaller, less resource intensive window manager. And on the flip side it has many amazing features which just work really well together.
Combined with tmux for terminal multiplexing, Emacs buffers for editing multiplexing and dwm for desktop and screen multiplexing this is just the right amount of flexibility to arrange and move around a lot of context.
Obviously this depends on each person, but since you can (and frankly, should) configure every aspect of this, with just a few keypresses you can switch to every part of your running programs and back, be it in the terminal, on a remote system, or graphical.
To be honest, until there is a better alternative to keyboards, I think I'll keep using this approach, maybe adding more scripting capabilities in the same line as in previous blog posts.