[IchabodCrane]

I've tested seemingly a hundred different JPEG settings on my K-30 and have come around to one that almost always comes very close to the corresponding RAW for color and contrast: Bright with -1 Saturation and 0 Contrast (default contrast is +1). One would think some version of Natural would be better but I never could make it as close as reds in Natural have a blue cast. Skin tones don't look as good to me in Natural, either, compared to the RAWs.

As always, there is no one right answer for everyone.

[kodai84]

I've found myself (after switching from K-x to K-30) using "Natural" much more than before instead of Portrait, Landscape, and Vibrant. I also seem to use the "Auto" WB setting more too, as it seems to do a better job than before (more often better than the custom setting I would normally choose for the situation, with the exception of "daylight" which seems to work best for nearly all outdoor work). YMMV.