I use a mixture of Notepad++, Dreamweaver (CS5) and Expression Web (3).
Notepad++ -> Quick edits, nice handling of syntax etc.
Dreamweaver CS5-> Shows errors as you're doing things/ IDE
Expression Web 3 -> IDE/ loads quickly.
I know people that prefer Netbeans over Eclipse. I've played around with both, but find myself doing a lot of editing in Textpad. Those of you with experience in Eclipse and Netbeans, would you like to compare features for us?