RAW - 100%.. RAW provides the ability to make correction on unaltered data - what comes from the camera is available without any compression or lost bits. With the tools available today, conversion and editing is a snap - it takes some work but there is a unique benefit - since you HAVE to convert.. you take the time to improve your photos rather than just taking jpgs, and not editing them before putting on a blog or printing.

Even if you learn to shoot better.. you will still make corrections. I modify every RAW file I want to keep in some manner.. It might just be a tweak to the curve or adding .05 to the exposure.. but I can always improve on my photos and I'm a pro photographer.

If you have the ability to shoot RAW.. go for it! I will admit that with cameras getting better these days.. there is nothing truly wrong with the JPGS you can get from most of them.. but I think it is more of a thinking that if it is jpg.. you won't make the edits necessary to improve the photo since it is already in a mode that is easily viewable.

Just my thoughts... good luck!