I'd love to rock two phones but it's not a waste, for me anyway.
This is why I started looking at the Nexus 6. The S6 felt almost the same size as the iPhone 6 and I have gotten used to the bigger plus and love the real estate screen size. It's perfect, has fantastic battery life (I get a full day) and is good quality but iOS is boring for me. It's a great OS but I just want more.
Maybe I'll just order the nexus 6 and have a play around with it.
I got bored with the Plus and the size was getting a bit ridiculous for it being a device with a 5.5" screen.
I had no functionality reasons to keep the Plus. I'm very happy with my Nexus 6 and Note 4 now and will not ever consider using a Plus again.