There are lots of awesome phones on the market right now. To further assist you, I think it would be a good idea to get a little bit more info on what tasks you accomplish daily on your phone right now (without going in the specifics) and also about new things you would like to do with your new phone.
That way, users will be able to chime in and suggest what they think would be best for you
I'd tend to look at the choice of phone, as more like a choice of ecosystem/religion.
If you actively use iTunes, have an AppleTV, a Macbook, an Airport for airplay speakers, even use some of the iCloud services; then I guess the answer is quite clear; you're best served with an iPhone.
If you're more 'alternative'; you're into Spotify, have a Chromecast, avid PC user, got your gmail and use everything related to it, then the answer is quite clear; Android-based phone.