A fourth -
high karma people have a halo effect (while that sounds a little like one of the others ones mentioned) I think it's distinct.
I had an experience the other week with the halo effect as follows.
I was somewhere and struck up a conversation with a man that I believed to be the actual head of a top 10 law firm in the US (a distant relative who I met for the first time). With a private jet, home in Aspen and a few thousand lawyers under him. While I was talking to him, I was noticeably aware of literally how important he seemed on one hand, and how "down to earth" he seemed on the other. (He actually didn't seem that sharp to go with who I believed him to be, in a George Bush kind of way.)
But the halo was still there (I was doubting my instincts all along).
After speaking to him for 45 minutes or so I asked for his card. It turned out that he wasn't the head of the firm, he was the son of the head of the firm (he was a senior partner none the less).