Once you go Notepad, you never go back.
I'm talking about that function that allows you to duplicate lines at a split second, the mighty CTRL+D.
Or, what about that super combination of CTRL+SHIFT+ALT, which allows you to do a vertical selection.
Or that CTRL+SHIFT+Q, which comments the selection.
Even better, what about that CTRL+ALT+M combination which formats your Javascript code and beautifies it.
I can go all day long.
In short, there is no IDE or text editor which comes close to Notepad++.