I've had it on C-o forever to mostly stay out of readline's way, but I've been dabbling with C-Space.

I never really understood the people who use these keybinds. Do you not use it to go to the start of the line?

Ctrl-a and then a still goes to the start of the line.

Personally no, I use vim keybindings in the terminal not emacs which is the default.

I just remapped the keys to ctrl-z after I swapped ctrl and caps lock. As you'd never suspend stuff under tmux for obvious reasons, you'll get the whole keyset for any cli/tui software.

I use tmux to replace terminal emulator tabs, I also suspend jobs all the time (most notably vim to run git commands)

In any case with your bindings you can still C-z z and it sends C-z to the process.

I'll bite. What's so obvious? I suspend jobs in bash all the time while using tmux.

Often TMUX it's for tasks you woudn't suspend. And, if any, you can just use kill -STOP and kill -CONT among other signals from another tmux pane.

Or if you want to stay in same pane, (chord, I still use C-b), :, "send-keys C-z"

+1. Was using screen with this and now tmux for the last 15 years maybe.

pinky on caps and ring finger on z ?

I use Ctrl-Space.

    unbind-key C-b
    set -g prefix C-Space
    bind-key C-Space send-prefix

I find it a lot easier to type than either Ctrl-A or Ctrl-B.

The real superpower prefix key is ` especially if you have a british mac keyboard.

Both C-a and C-b are so commonly used that I don’t like either of them. I ended up going with C-\ since I only rarely use that one.