What are the 3 killer features of your favourite text editor that you couldn't live without; the features that keep you loyal to your editor, no matter how good other people say other editors are?
EDIT: Sorry for what appeared to be a dishonest, or karma whore question. I honestly didn't mean it that way. I have turned it into a community/wiki question.
Later EDIT: FWIW (to help soothe irritated nerves), I'm not asking this for pointless discussion. I am the author of a text editor, so I am trying to tap my target audience so I can direct my development efforts in the right directions to please more users. People very often say "editor XYZ rulez!" without saying why; I want to know the why.