Regarding DPP, I always set the "picture style" to neutral. This means " no picture style".[{POST_SNAPBACK}][/a]
The "neutral" style still transforms pixel values through an input curve. However, there is no color enhancement as far as I can tell. The huge downside to Canon's software is we can't see or edit that curve to our liking. The Neutral style has been saved and "locked" so none of its parameters can be seen or changed in Picture Style Editor.
Raw Developer, on the other hand, does have editable input curve parameters (along with many other input parameters) that allows for incredible control of the image data before the application of RGB curves, chroma curves, sharpening, etc.
Even Capture One uses input curves but they only offer three curves, none of which are viewable or editable ("film standard", "film extra shadow" and "film high contrast").
The input control of Raw Developer makes the program worth testing. My only wish is for an overlay feature like that of Capture One. When working with client approved layouts it is a very powerful feature.
I don't know of anyone who uses advanced Picture Styles, but a complete explanation of Picture Style Editor, along with more additional downloadable Picture Styles, can be found [a href=\"http://web.canon.jp/imaging/picturestyle/file/index.html]here[/url].