I have often considered the things that my bosses have done that ticked me off, but at the same time, I have, over the years, had some actually wonderful bosses that have pulled my and other employees behind out of (considerable) fires.
While we all need to vent about the negative things some times, and these forums have seen some of that, I think in the long run, a discussion about what managers do and have done that was positive may well be far more productive to any management types (that ever happen to read any of these forums) than our venting would have.
You know that while it is easy to tell someone what they should -not- do, they may listen more to a suggestion of what they should do.
With that, I now challenge everyone who happens on this thread to try and remember some point that one of your bosses did something that was so "right" that not only did it stick in your mind, but also improved someone's place on the planet. I don't think we need need to "name names" unless you want to, since, at least in the places I can think of, the people involved may well remember the incidents and know who they are, (and recognize the appreciation for the "good deed").