Because it's awesome
I choose to be poly because I want to be free. I choose to be poly because it's awesome, and once you've experienced it, looking back over the fence is a dismal experience. Knowing that poly can be 'hard and complex' is not enough to stop me from wanting to love openly and freely. I won't deny what I want, and I'm totally willing to put in the 'work' (honest and open communication) to get it.