RAW (how come we always capitalize RAW -- it's not an acronym) because I want to chose what the final image looks like, not leave it up to the minimal choices the camera gives me for tweaking jpeg output. Then there is the fact that I'm not very good when it comes to estimating proper exposure. I sometimes need the latitude available with RAW files to make the image usable.
A recent Lightroom update make the Auto button in the Develop module pretty good. In many cases clicking "Auto" then fine tuning the adjustments makes for a very quick edit; almost as fast as shooting jpeg.