I am going back to the OnePlus One. I had one last Fall, and sold it for a iPhone 6 Plus I jailbroke, but now I am missing Android a lot.
I value battery life #1 option
Price was an issue, but disregard price, what other newish type Android phone has the battery life like the OPO, that has been released in the past 12 months ? The Note 4 maybe ? I hate Tocuhwiz, and not a fan of the Note 4. The Nexus 6, nope, my Wife has it, and the battery life is good, but not OPO good, and the Nexus 6 feels cheap to me.
Only other good battery life phone would be the Sony Z3, but the development community looks pretty bleak, but other than that the Z3 seems like a great phone. But is the Z3 worth the $550, vs the OPO at $299 ? IMO I don't think so.
I still view the OPO as the true Nexus successor to the Nexus 5. The OPO looks like a larger and newer Nexus 5, and has the price point of Nexus phones too. Where the Nexus 6 is nothing like the previous Nexus phones. My Wife has the Nexus 6, it feels cheap, it rattles when haptic vibration on, it just seems ok, but certainly not great, and certainly not a $650 phone.
Out of the four 2014 Android phones I owned last year, the Galaxy S5, HTC One M8, OnePlus One, and Nexus 6. I put the OnePlus One at the top, and a close second the One M8, if the battery life was better, I'd say M8 #1. And then the Nexus 6 third, and S5 last.
Lastly I am not dissing my Jailbreak iPhone 6 Plus, it is a very nice phone, with EXCELLENT battery life, but it's more iOS I am not a fan of. Maybe iOS 9 or iOS 10 will bring me back. I like stock Android, or close, like the OPO has CM12S or the new Oxygen OS from Paranoid Android team, made specifically for the OnePlus One.