Well, in some ways it matters in that you're asking questions that encourage you to look within. That's great. Whatever label get's put on what you find has little to do with the reality of your experience.
I simply identify as someone who is open to relationships in whatever form they present themselves to me. At this point, those relationships are poly in nature and they're what works best for me, but doesn't change who I am. If at some point in life the relationship that works best for me is monogamous in nature, it still wouldn't change who I am and how I identify.