There is aspects I like about android don't get me wrong, i like the developer base, and how open it is if I was a programer - but you can't beat the smoothness of ios. Phone never gets slower over time, rarely freezes, free updates. Plus if you are into jailbreaking, opens up a lot more content.
I notice apple added a much of jailbreak tweaks, i think its their back door development of ideas. They say they don't like jailbreaking community, but really they love it.
I haven't upgraded my 4S yet, I'm excited for this. Just haven't decided which one, probably the 6, bc I 6+ seems to large, was not a fan of the size of samsung note, or would sell my ipad - having both wouldn't make sense.