Yeah, that's a really good question. Great question, in fact. Probably, it should. When I asked other close friends of mine, I noticed that the qualities they enjoyed in others were the same ones I respected/admired/enjoyed in them!
Some of the traits they listed were compassion, sense of humour, kind, open-minded, non-judgemental. Humour ranked at the top of most lists. I think we like others to see the lighter side of life when too often we are down in the dumps about one thing or another.
"She thinks everything is possible" is what one friend said. I liked that.