I know people whine about the price tag, but you’re certainly not buying it alone, you’re getting it as a part of a creative suite (most designers and developers are going to need access to Photoshop and Illustrator at least).
I like its FTP function (despite some extremely minor complaints about it lagging occasionally). I enjoy the auto closing tags (which you can also find in the majority of other editors). All in all, most of us are using a CS of some sort, why not use the program that comes with it?
I have Dreamweaver CS4. I like it but I don’t like that it is a resource hog. I would rather save my memory for Photoshop and Illustrator. Other then that I do use it when I forget certain CSS and HTML tag.
When I use other text editors, I like how I am forced to hand-code. This helps me learn and remember HTML and CSS.