London, to clarify: you avoid friendships with metamours? I don't like to be expected to hang out with metamours, but I personally would prefer to be friendly if not friends with mine. I think it makes communication easier (I'm a fan of talking out problems with the polycule when necessary). To each their own, though. I'm constantly intrigued at how different folks handle this stuff.
Anyone else? What are your post-relationship metamour experiences? I suppose it's unpopular in the poly community at large to not remain friends with former lovers, so I suppose this could be a hard one to talk about.