Alceste
Vagabond
I'm guessing, no jealousy either.
Jealousy seems to cause more problems in monogamous relationships, IME. The poly people I know are very patient and communicative, so when jealousy does arise it's discussed - sometimes over the course of weeks, or months - until it is resolved. Everybody agrees on the boundaries, and people are very considerate of one another.
I respect poly people greatly, but I'm monogamous myself because I don't have the patience or the inclination to discuss my feelings for hours on end, which is what is needed for poly relationships to work. Also I'm too selfish: the appeasement of my own sexual insecurity matters more to me than my partner's complete happiness and fulfilment.