I have my keybindings work everywhere, in Spotlight, I can captialize, or lower case words everywhere, and such, I have and extra yank/kill buffer apart from the paste board. It is not about the editor really, it is more about the whole user interface, and I use BBedit for editing, which doesn't use it. But sometimes, it feels very good to just use TextEdit, and have a multi-window environment for writing small texts, and to set a mark and such, when the text grows longer. All that kind of stuff that I feel making the work more fun. :)