Gedit is the one I use most. Really, why would I need more for daily use? I wouldn't bother pasting stuff or taking simple notes with Vim, Emacs or even the specialized apps for that. I can read text files from the file browser with that, and for my other viewing need I have less.
When I program, it's usually Emacs, otherwise Eclipse for Java.
I use Notepad for this same reason. It's so easy to just hit win -> r - > 'notepad' on my XP laptop at work. Anything I need a text editor for, Notepad fits the bill. When it comes time to start coding, then I move to an IDE.
When I program, it's usually Emacs, otherwise Eclipse for Java.