I use Zsh with the Oh My Zsh! framework, and I use a different theme depending on which subuserland I’m in, by customising ~/.zshrc. For example, I use the gentoo theme on Debian and its derivatives, agnoster on NixOS, darkblood on Arch, strug for Mageia, apple on my macOS device, aussiegeek on FreeBSD, and gallifrey on OpenBSD. Different themes helps me remember which package manager to use and which distro-specific commands will work.
I’ll send some screenshots in a bit, when I boot up my PC.
I like Zsh because of its tab completion and command history. I also quite like its plugins.
Before anyone asks, I have tried Fish before, and I prefer Zsh. I have tried configuring Bash before, and I prefer Zsh. I have played with Ksh and Tcsh on BSD, and I prefer Zsh. I used PowerShell a long time ago, and I prefer Zsh.