Chris,
It is the lack of simple communication that bothers me as much as anything else. Example: When it became known years ago that I had a lot of small plans, I was continually being asked for copies, that I would usually supply by e-mail, often stopping what I was doing in order to oblige. Only about one in ten even bothered with a simple acknowledgement that they had arrived, or a "thank you" note via e-mail. Consequently, I stopped supplying them.
Another time, I took a private commission to build a model for a four-figure sum. I worked away at it for weeks, keeping my client updated with loads of e-mailed building images. Finally I completed it, and sent all the completed images. No response at all. About three months passed, and I still had heard nothing, and convinced myself that they no longer wanted it, but were too embarrassed to say so. By that time, we had grown quite attached to it and were happy to keep it. Then, without warning: "I will come and collect it in a couple of days!" They did collect it, and were obviously very happy with it, but I would have appreciated it if they had told me the collection was to be delayed by three months, rather than just leaving me in the dark!
When I did private commissions, and sent them out by courier. About 50% of my clients never even bothered to tell me they had arrived safely, and that bothered me very much. Fellow model shipbuilders have also had the same experience, and it really is quite disturbing to have a model that you have put your heart an soul into, just disappear without trace, especially when I always requested that they advise me of its safe (or otherwise) arrival.
I also do a lot of writing, and produce them as downloads for nominal fees. They are seldom acknowledged, but that doesn't matter, because if they do go astray, it is a simple matter to send a duplicate.
But models are different because of the time, thought and effort that go into producing them, and the financial loss to me if they get damaged or lost! Lost several hundred £s on this one!
Bob