Primarily my customers want a knife that keeps an edge and requires no maintenance. Almost all of my customers are hunters/farmers/business owners or a combo of all three. They just aren't going to take care of their knives (or their guns, which I also work on) like most here would. I find my attention to taking care of blades to be an anomaly among my customers. These aren't lazy people, just the opposite, they are all very busy and that may be why they have the attitude towards maintenance that they do. None of them have asked for a blade with steel that is easy to sharpen in the field. They want a knife that starts very sharp, and retains a working edge for as long as possible. All of them have jumped at my offer for free touch ups.
So to answer your question, I use stainless exclusively. I am willing to use cs if asked, however out of the few I've sold and 30+ that I owe people, none have requested cs.
I like CPM154 the best so far. It is both tough and durable. Takes a razor edge if done right and is fairly easy to surface finish to whatever is desired. The final hardness I aim for is 60-61 RC and so far that has made the edges tough, yet not so brittle that chipping is an issue.