Qtile, just because it's Python-based.
Now is a good time to catch up with the archives: https://thetortoisewebcomic.net/
Fediverse links (will soon be added to the website): Lemmy: https://lemmy.world/c/thetortoisewebcomic Mastodon: https://comics.town/@thetortoisewebcomic
Xonsh. For basic use (running CLI programs with arguments) it works like any other shell, and for other uses it has nice Python syntax (and libraries!). For example, I like not needing a separate calculator program, as I can do maths directly in the shell with an intuitive syntax.
I like Terminator for its mouse-controlled multiplexing. I also like the fact that it's made with Python, although I haven't utilized this fact in practice.
I don't know what Nitter is, but I think bird.makeup might be what you are looking for.
I've got used to XFCE.
Well, Python is my main programming language, so things being made with it gives me a feeling that I can understand and control them. Sometimes this feeling is even right, for example with Qtile, which is also configured with Python.