For a couple of months now I have been experimenting with both a Nexus 4 running KitKat and an ATT Lumia 520 with Windows Phone 8. First off, I must admit that I am partial to the iPhone. But maybe that's because that is what I'm used to.
I was trying to make the Nexus my main phone. I like the additional screen real estate over my old iPhone 4S. But I just don't like it as much. Not even close. There are thousands of apps but I just can't seem to get comfortable with it.
The Lumia 520 Windows Phone? That is a strong second choice for me. Surprise surprise! It is a much more natural feeling phone. I mean the OS. There are not as many apps yet by a long shot but I'm hoping they get there. Microsoft deserves a winner here. I would like a larger form factor but the 520, unlocked for $99 retail, was too good of a deal to pass on. And I understand that the Windows Phone OS is VERY popular in several other countries. Good for them!