All pictures are heavily post processed. The original "picture" is just a bunch of brightness values for green, red, and blue dots. They need to be processed so that the dots are full colored. They get sharpened. They get noise reduction. The contrast is adjusted. The white balance is set.
I don't think the appropriate question is whether your pictures are post processed. I think it is how much do you control the post processing.
I do almost all of my shooting in RAW, so that I have the most flexibility and control over the look of my pictures. When I load them into my photo catalog, I apply some presets to do basic processing. In my case, I use Adobe Lightroom as my catalogue and processor. I have some default selections that get applied on import. From memory, those are:
- Camera style set to neutral
- Lens Correction on
- Clarity at 20
- Vibrance at 20
Once I import them, I make a quick pass through to pic which pictures I want to consider keeping. Once I've done that, I decide if I want to much around with the white balance. I find that auto white balance does a resonable job in some cases and lousy in others. When it doesn't, I get the white balance I want for one picture and then copy that to other pictures taken in the same light. I also make some other adjustments that I copy to most or all pictures in a group - changes in clarity, vibrance, noise reduction, sharpness. I sometimes make global tone adjustments like increasing exposure or brightness.
Once I'm done with the global work, I go back through picture by picture and tweak those that need tweaking. Tweaks almost always include tone adjustments (exposure, black levels, brightness, etc). I also do some cleanup (cloning out dust spots, blemishes, etc). Sometimes it also includes applying gradiant or painted on exposure adjustments. I also cut down on how many pictures I want to keep. If I've taken a lot of people shots, I sometimes run them through Portrait Professional for quick touchups. For most shoots, I leave it at that.
If there are some special pictures, particularly those that I want to print, I spend more time and energy on those shots. I usually do detail work in Photoshop rather than Lightroom. Detailed work usually involves things like curves adjustments to tweak the tonal range, targeted sharpening or noise reduction, and special touch-up work for people's faces and bodies. If I'm going to make a print, I'll resize for the printer and then make a global sharpening adjustment to optimize for the printer.