I'm sure that there are many people who believe they have a wonderful new word to use to describe their particular version of Multiple Partner Disorder: "polyamory". Huzzah!
Pardon me for being underwhelmed.
First: I have yet to see a definition of the word that makes a lick of sense, given the rest of what passes for English. Sure, I could make up words, too, but I would want those words to have to mean something that isn't otherwise clear, but is distinct. That means a definition that is simple, elegant, and necessary. I've read quite a few definitions, none of which fulfill those points. But sure, I'll wait a few decades and see what happens.
Second: Requiring a label to identify yourself is just awful. Why is it anyone's business but your own or those close enough to matter? If someone wants to know if there's a "name" for what you're doing, then chances are fair "serving your best interests" are not on their "To Do" list for today. Tell 'em something ridiculous -- like "bearbaiting".
Third: The primary use of this word that I have seen is as a weapon -- to attempt to draw some line in the semantic sand between "us" and "them". It doesn't matter who is lumped into the "them" category, but a real easy test is to ask anyone who self-identifies as one of "them" if they agree with the importance of such a division. My lame-ass poll indicates a 100% "whatever" rate when asked by "them" and a comparably high percentage rate of "Oh yes, it's very important that no one mistake one of us for one of them" attitude when talking to someone identifying as "us". Don't make me spell out how suspicious those motives might be -- I've watched too many Scooby-Doo episodes to be fooled by such cheap-ass smoke and mirror tricks.
Hm, no solid definition for a word that isn't contextually useful except as a separatist weapon. Yeah, real tempting.