I learned vi back in the day and have never really graduated to vim.

My favorite features are the ranges on the commands (like substitute or delete), piping the buffer into the bottomless utility of the classic UNIX command line, and the . do again command.

About the only vim feature I use today is being able to navigate while entering text, but even after all this time, that is not automatic to me.

I have used syntax coloring a couple of times, I find it particularly useful for XML, especially XML with chunks of XML commented out.