I recently purchased a licence after having 'defected' from another *lesser *text editor and have to say I find Sublime to be a superb piece of software - it's really speeded up my workflow and made me more productive. Plus,I think it looks really cool too and I just love the minimap.
I use the project functionality in Sublime quite heavily and one thing I do find myself doing a lot, and this is probably more relevant now that we have the new option to allow directories to be opened on-the-fly as a project, is always excluding the same types of files from showing up in the project. eg *.jpg, *.png etc
What I think would be really useful is if there was an option to exclude file types (and possibly specific directory names as well) globally from all projects without having to specify them each time I set a project up.