Curious as to how most people kill their mice. I'm a scientist and do a lot of mouse work. Gas is commonly used to kill them but personally i prefer cevical dislocation (neck break). IMO it is very quick and painless and easy to do if you know how.
From what I gather, full decapitation is the most humane way to kill a mouse... but that is obviously not practical for killing feeders.
I think I would do live just to get the experience because it is the way of life and every snake should experience it at least once, you know? To live like a real snake not in captivity for once. Eventually I would switch to frozen.