Sorry - I was referring to non code-focused editors. The great thing about TextEdit is that it looks like Notepad when I launch it, and yet it has incredible support for design, typography, layout, and positioning. I can write most school papers in it, but it still looks and feels ultrasimple.

TextMate does some awesome stuff, from what I've heard, but it's much more focused on coding. TextEdit is more general-purpose, which is why it's my standard. Until another OS spends as much time making a kickass all-purpose editor, it probably hasn't got the level of detail that I want in my operating system.