Whats your favourite code editor? +

Like the title says, whats your favorite code editor and why?

Personally i have used NPP since 2007 and that fast became my favorite mostly for the ease of styles for my PHP, CSS and HTML. I do however lack a live preview tho. For this i have to setup a "dev" page so i don't publish something stupid just to try it out, would be better if i could just type some code, refresh in the same window and save/publish any ideas what im looking for?