As I use bash basically for everything, I wanted my prompt to be as basic as possible (No newlines, fixed format) and compatible across my PC, Laptop as well as server and Pi via SSH.
Therefore, it’s a simple __prompt_command function in my .bashrc (nearly) everywhere.
It’s structured as:

1. Terminal/TTY number in orange
2. Username in green (for roots .bashrc it’s red)
3. Hostname in green
4. Current working dir in blue
5. Current git branch in yellow (if in a git repo)
6. Exit code in red (if not 0)

Looks like this:

I used some prompt generator to get the variables and colors right, and then wrapped parts in if-then where needed.
The result is:

__prompt_command() {
    local EXIT="$?"
    PS1="\[\033[38;5;216m\](\l)\[$(tput sgr0)\] \[$(tput sgr0)\]\[\033[38;5;85m\]\u@\H\[$(tput sgr0)\]:\[$(tput sgr0)\]\[\033[38;5;68m\][\w\[$(tput sgr0)\]"
    local GIT_BRANCH="$(git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/')"
    if ! [[ -z "$GIT_BRANCH" ]]; then
        PS1+=":\[$(tput sgr0)\]\[\033[38;5;142m\]${GIT_BRANCH}\[$(tput sgr0)\]"
    fi
    PS1+="\[\033[38;5;68m\]]\[$(tput sgr0)\]"
    if [ $EXIT != 0 ]; then
        PS1+=":\[$(tput sgr0)\]\[\033[38;5;1m\]${EXIT}\[$(tput sgr0)\]"
    fi
    PS1+="\\$ \[$(tput sgr0)\]"
}

In practice I use every aspect of it. The terminal number is useful for sorting, the username is needed especially when handling e.g. git or db servers with specific users, and one has a terminal as the user, one as root and one as normal user. Hostname is obviously important with multiple ssh sessions open all the time (especially without terminal emulator titles). Typing pwd all the time would be very tedious, as I only move around my system in bash, so having it in the prompt is nice. If I am in a git repo I also need to know the branch and otherwise it’s not displayed anyway. Quickly identifying silently failed commands is tedious, especially because issuing one command overwrites $? again, so ‘logging’ it if necessary is nice.

I just use the default fish without any modifications.

To be fair, I don’t use the terminal that often.

Even for my homeserver, I access most stuff (containers, updates, etc.) graphically with CasaOS (a web interface), and as a more “casual” PC user, I work with the tools given by my DE. I don’t do much fancy stuff.

And when I really need the CLI, fish is alright for me. It’s simple, has sane defaults, and feels (thanks to the automatically activated spell check and completion) very efficient for me.

Bash isn’t bad, but feels a bit lackluster. Zsh may be better, but requires too much configuration for what it’s worth for me.

I’ve been using zsh for some time, but I finally switched to fish. I also checked out Nushell, it lacks some features, but it’s really interesting. On zsh I was using Powerlevel10k, on Fish I used oh-my-fish with the shellder theme before I switched to Starship. I’m very happy with this setup. My prompt looks like this:

My Terminal Emulator of choice is kitty, the font is Monocraft.

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.

I’m on the boring side…

PS1="% "

I like it though, it gives me more room for commands !

.bashrc:

# Prompt
# "Make it simple, just the dollar sign"
# "Say no more, fam"
# - if error code is not 0, then prepend [N] where N is the error code
# - if user is root, use red and #
blue='\e[34m'
red='\e[31m'
bold='\e[1m'
reset='\e[0m'
PS1='$( status=$?; [ $status -ne 0 ] && echo "[$status] ")\['"$blue""$bold"'\]$\['"$reset"'\] '

if [[ $EUID -eq 0 ]]; then
  PS1='$( status=$?; [ $status -ne 0 ] && echo "[$status] ")\['"$red""$bold"'\]#\['"$reset"'\] '
fi

.inputrc:

# vi mode, change to 'emacs' here if you prefer
set editing-mode vi

# vi INSERT prompt
set vi-ins-mode-string "\1\e[30;44m\2 INS \1\e[0m\2 "

# vi NORMAL prompt
set vi-cmd-mode-string "\1\e[30;47m\2 NOR \1\e[0m\2 "

I use fish + tide

I tried zsh+p10k before fish+tide, but zsh felt annoying in subtle ways that weren’t fixable with (existing) plugins, so I switched back to fish, but installed tide to mimic my previous p10k theme.

Yes, I use starship with nushell.