I been on iOS for years, ventured off to the Note 3 for practically a month.
But the reason I decided to go to Android was try to experiment and see if I can keep it. The Note 3 was a beast of a phone, I really did enjoy it. But my only issue is that it's not iOS or an Apple product.
I already have a Mac & iPad, and trying to squeeze a Note into my daily use was awkward. Most of my family had iOS, so I'd had to give up iMessage. It's ironic the minor functionality that we as Apple users might take for granted.
I'd really contend... iMessage is the best thing Apple has going forward. Android has Hangouts, but it isn't seamless as iMessage. Hangouts doesn't even have a standalone app. I'll have to keep Chrome open in order to use Hangouts. And Hangouts for Android is really screwed up.
But all and all, I really doubt I stray away again for iOS... The grass isn't always greener on the other side.