Love this editor more than I've ever loved any other. (and in the past 12 years, I have tried them all; pico, vim, emacs, BBcode, dreamweaver, Textwrangler, Notepad++, Textpad, Visual Studio, Aptana/Eclipse, Netbeans, Espresso, Coda, Textmate.... and a few other random ones in there as a trial basis.
One feature I'd really love to see is to drag and drop an image from the sidebar into the code window and have its HTML attributes set.
Use case: User clicks on images folder to expand it. User drags foo.jpg to code view. The following markup is generated:
<img src="images/foo.jpg" alt="foo" width="400" width="200">
I did use this in Textmate once I found out that the feature existed.... but I've moved on to the next level and I have no interest in going back!!! Long live Sublime!!!