A good article, Janet!  I've had bad managers, and good managers.  I realize that I probably haven't has managers as bad as your ugly managers.

One comment; I think the influences that make for bad managers are hard to define.  Yes, I agree that it does involved trust and respect, but I've a feeling that there is more.  I've worked for a company in which some developers were offered management positions and they tried it for a while.  However, they found that it was a no-win situation for them.  They were encouraged to take up more responsibility than they were capable of, and punished because they couldn't complete all of the tasks in timeframe that they were given.  Because of this they went back to being developers.  I don't really know why things like that happened (it happened to them before I joined the company) but something odd is happening.  I only hope that this is either an isolated incident or one that rarely occurs.