Originally posted by bob13bob RAW with no pp is better.
Doesn't exist. RAW in and of itself isn't displayable and is always converted by software into a displayable format on your PC. So what you are seeing prior to applying any post processing are that image viewer's default settings. Most viewers that handle RAW also allow you to change and store new default settings.
I personally don't like Pentax's factory jpeg settings. The color saturation is too high for one thing.However, at least on all current models, you don't have to stay with the factory jpeg settings. There are several optional predefined jpeg settings (sort of like there are several predefined exposure modes), or you can create your own - - and you can make whatever you decide your default.
My personal choice is to shoot RAW+ and let the camera automatically create both RAW (DNG) and jpeg versions on my SD card. That lets me decide after shooting how I want to handle the image.