1. The display. Literally everything about it. Not only is it beautiful, but I can see it in the sunlight as well as use it with gloves. And yes, I tested both. Watching video on it is also just wonderful. No other device has come close in this regards.
2. Wireless charging: I have heard the argument that "it still needs wires" and that when traveling "you have another device to take with you". Newsflash. It does still need wires. Just not plugged into your phone. For a person who sets his phone down multiple times a day, it's nice to set it down and charge rather than having to fiddle with a USB plug. Also, when going to bed, it's nice to just set the phone on the nightstand and know it is charging. Anyone who has fiddled with ANY charging cable (yes, I include the iPhone 5) in a pitch black room knows what I am talking about. And when you travel, feel free to leave your charging dock at home if traveling with "another device" bothers you. After all, you can still charge in the traditional manner with a cord...
3. Nokia Music: Yeah, I know other phones get this too, but this is my first time using it and it really made an impact on me. I would still like the option to rate up (or down) songs in custom lists. There are some artists that I just don't like listening to. But the music quality is great (for streaming) and there are no ads. Nokia hit a home run with this one.