I know what this is going to sound like but this K-7 has a "toy camera" digital effect that is pretty fun. Much like some of the Holga type 110 film cameras and such, when you select the filter the images it can produce are sort of selective focus, contrasting with slight vignetting and blurring. I'll post some images later.
Some of the buttons and functions differ slightly from my K10D and it is smaller; so there is some transitions going from one to the other. But this K-7 is another very pleasurable tool from Pentax!