About three bosses ago, I had one of the best bosses ever. He came in to a new area, where he had very little experience and was just fantastic. In one of our first meetings with him, he told us, "I've reached the highest position in the company that I want, and I won't leave you guys for a promotion or the next hot job." Which may not sound like a big deal, but he was our ... 7th boss in four years. Most of them had left after a promotion, so promising our team that we weren't just a stepping stone for his career ambitions was HUGE. He backed us in what we said to people, somehow managed to retain his patience when dealing with the p/a whiny person on our team, and was generally upbeat. When I got my new job, and had to tell him I would be leaving, he gave me a hug and told me he was sorry to see me go, but was happy for me. I'd talked to him a little bit about some issues I was having with getting my resume considered for certain areas and I was worried it might have to do with my background. About a year after I went to another position within the company, he sought me out one day and told me that other people in my old department were also having problems getting their resumes considered for those areas, so he'd made some inquiries and found out there was a bias in the recruiters for those areas (they didn't want anyone with customer service experience, for some reason). I couldn't believe that he'd remembered me mentioning this issue, and had taken the time a year later to seek me out and reassure me that it wasn't anything to do with me, but was more on the HR side!
After all the terrible bosses I had at that company (one would sleep on the job, and write you up if you had to wake her up, one announced that she didn't like any of us and would like to see us all fired, one would hide in her cube and refused to answer our questions, one was very clear that we were all very much below him and he was far superior and therefore could tell us what to do about everything including our home lives), this boss was the one who actually gave me hope that there were some good managers out there, and I just might be considered a valuable employee.