I use to be a Dreamweaver fanatic because of how helpful the IDE is. But after using Sublime Text 2 I was hooked on it and bought it. I like it because of all the plugin support it has and I use it both on my Windows machine and my Linux box.
Notepad++ is the best IMO. I’ve used it since day one. Syntax highlighting for a lot of languages, FTP support, Macro support and you can run it off of a USB should you want to. I keep a copy on a flash drive for editing stuff away from my regular computer.
Well if you are just getting into creating a site, and are not really a guru, then Aptana. You can start typing with b and it will give you a list. Then just hit tab.
If you are a coder, then you really want Sublime Text 2.