Have been using Sublime for 4 months or so and really enjoying it. It strikes the perfect balance between having enough nice features and tools to make programmer happy and getting to much in your face (like many IDE's).
I like using it as a text editor but have had trouble getting it set up for Scala development. Other than getting syntax highlighting I have had trouble integrating it with an outside compiler and getting a few niceties like auto complete and highlighting errors on compile. I'm curious, what language do you code in using Sublime and what is your set up?
I mostly use specific tools (either GUI or CLI) for specific tasks (such as git or svn), because that allows me to work faster. I've tried an IDE a few times, but i usually dislike the implementation of certain features (such as git) and the slowness. I could learn vi i suppose, but i'm just lazy :)