I'd love to win a One Plus One as it would be a big upgrade from my LG Optimus L9. I'd love to be running KitKat, have better battery, more storage, and be able to multitask without worry about apps being killed in the background.
I would like a OnePlus One because I am a fan of the software and the design of this phone! It is a bold move and a strong competition in the smartphone market.
I want one to check out the myriad customisation options for CM. I can't get CM on my Moto X, because it's Republic Wireless, so it uses their specific ROM for Wi-Fi stuff. Here's hoping!