I usually do not take part in this discussion as I think that everything has been said, but this opinion asks for a reply. Photography means painting with light and it implies that the sceen pictured is at it has been at the time. The art of the photographer is to choose bw or color, open or closed aperture, short or long exposure time, in and out of focus, short or long lens and finally high or low contrast, which is linked to the aperture off cause. All these parameters have to be applied so the look on paper or screen still matches the real world scene. That's it! Not more! If this is not enough for you to express yourself you have to choose a different medium. Think of Mr Turner! If you excuse your manipulations with the argument that you are an artist and that you are therefore not tighed to the real scene, than you have to create a new word for your products. Pixel painting starts with a photo, but the end product is something different. So you should be honest and not call it photography. Call it pixelpainting, pixpai, pixpaint, pixpo etc..
If you do not make this clear on any of your creations, you are simply lying, because everybody looking at the photograph thinks that the real world scene was as shown.
HDR is inbetween, because no human eye and brain pictures the world in this way. The vast majority of those images look like drawings anyhow, especially bw images. I simply cannot understand that many people have lost the sense for what a photo means to the person looking at it.
I think that because you have to develop your raw files and because of the almost unlimited options you have people have lost contacts to the reality. If you have a slide or a negative in your hand you have the proof and the starting point of your optimisations and you can always compare the outcome with the original.
People like to have this kind of assurance, that they are standing on solid ground. I think this is why people who have grown up with digital photography fall in love with analog (!) once they hold their first negatives or slides in their hands. Those who haven't done this yet, go out and do it at least for two rolls, one in bw and one in color (slide!).
By the way I am using a point and shoot digital to have a camera with me all the time (Lumix LF1). Most of the time I use bw and if color makes thei image I use slide. Scanning is not the biggest fun, but I also do not want to have to develop every image with a raw processor. I admit that I am thinking about the a7s, in part because of this, but mostly because of the high iso, the only real advantage of digital recordings (thank you lula for your review and comments, other reviewers seem to have sunglasses on all the time).
Yours , Graubaer