I guess I'm more of an Android "fan" in that I prefer it over iOS in general after using both fairly extensively. As is the norm, I find iOS to be a bit more polished than Android but a bit less forgiving when I want to do something that isn't the default behavior.
Granted these are more generalizations but they're a bit of a cliche for a reason. Still, the combination of a bit more flexibility and the ability to buy a Nexus (or that one time, a Moto X) for $350-450 instead of $650 and up for an iPhone has kept me in the Android camp for the past several years.
I've also been holding off on replacing my Nexus 5 and will still wait to see just what the word is on these new Pixel phones but I will say that the higher, more iPhone-like price means I'm likely to be less forgiving of minor issues or complaints that I'd just deal with on a device that costs 2/3 as much.
Just as my Asus laptop has a worse screen than a similar Macbook sold at the time but cost $950 instead of $2200 for otherwise similar specs, I have no problem accepting some tradeoffs for the right price. But if that Asus had be marked at $1950 compared to the $2200 Macbook, I might have just gone with the better viewing angles and better support record.
Still, it's all just speculation. We all make our purchasing decisions after we get a chance to evaluate all of the options. Until the devices and reviews show up, it's all a bit premature.