As much as I love the Nexus 5, I think that the screen is too big. I prefer smaller phones, but I was ready to give up and go for the Nexus. Now I'm having second thoughts. I come from an iPhone 5. This is a big phone to me.
I actually went back to my 5S unfortunately. The size was a bit too big for me. Autofocus is also extremely slow for some odd reason.