My choice of photo editing to express my art is largely based on my desire to minimize how much room my materials take up in the small flat I share with my wife and two cats.
I also find it convenient to carry my small 'snapshot' digital camera in my bag or pocket than a pencil and a pad, although the conversion from photo to picture is much the same as that from a sketch. For me the camera only has to capture a composition featuring some kind of consistent lighting - everything else is down to me.
My pictures must say something, they are not a recording nor something that happens to be pretty. Neither do I spend any time looking to see what other artists have produced, and certainly never seek to copy other people's work or styles. My favorite subjects are those I take while my car is stationary and my wife.