This may or may not work for you: each space dedicated to a project has a desktop image related to the project - a logo, an important visual asset, etc. It mostly works for me. Wish you could name the damn things out of the box though.
This is a good idea. I started testing this previously by just choosing different wallpapers, but didn't take a step further to photoshop in some text.
I may yet in addition to the space naming. It feels like it would be helpful to see on the wallpaper using expose, and also from the three finger swipe up.
Really, Apple should allow this meta to be overlayed on a wallpaper instead of having to photoshop it in. I'm perplexed on why Spaces has gotten zero improvements for so long.
I never bother adding in text. It's just a matter of choosing images that are obviously-related for me.
Working on the graphic novel? Go to the desktop with a model sheet of one of the characters/props. Working on the Mastodon instance? It's the desktop with the image I drew for the front of the site. Drawing furry porn commissions? Hello, desktop with an endless rotation of Doug Winger's work.