So as of 1.6.1 you can turn off natural healing with /gamerule Naturalregeneration false. This makes it so you must eat a golden apple or use some kind of health/regen potion to regain your hearts. I think it would be cool if we could implement this on a personal level. By this I mean you start out by default with normal healing on, but then for a more challenging gamemode you could type /gamemode Uhc, and then your natural regen would be off. Just something I find fun to do in singleplayer, really makes the game more interesting.

