iOS 7 is butt-ugly, but iOS apps are still superior over Android apps at this point, so no switch for me. I don't use Apple's ugly and lame default apps, so I'm mostly only annoyed by iOS 7
outside the apps I use. I praise all iOS app developers who refuse to succumb to the
flat fad. I recommend Calendars 5 as the calendar app, and Nebulous Notes as the notes app.
If my iPhone 4 ever breaks down, Nexus 5 would definitely be the no. 1 replacement candidate. I'd like iPhone 5S, too, but if it's twice as expensive compared to Nexus 5?
I agree battery life is a weakness of the Android platform. The battery life of my new (!) Nexus 7 is weaker* than battery life of my iPad 3 (over 1.5 years old) and even iPad 1 (over 3 years old!). Enough said.
*
Actual use time is equal between Nexus 7 and iPads (around 10 hours), but iPads last a
lot longer while in sleep mode. Nexus 7's battery discharges a
lot faster while in sleep mode, which sucks.