Q: Which Windows Phone do you like the most?
Lumia 1520.
Q: Why for?
CAMERA
Big, clear screen even in sunlight.
That battery, it just keeps going.
All the amenities: Qi, SoC, RAM, storage + SD, shoots DNG, camera button, form factor, color choice (I have yellow), sound, still highly relevant. This may be the best all-around Windows Phone ever produced and it came at the zenith of independent Nokia and Windows Phone
Q: Did you miss anything on it? If yes, what and why?
The camera could be better in low light situations. I really like taking pictures at twilight.
Q: Did you find anything frustrating on it (other than app gap)?
I had a touch of screen problems with phantom touch, etc. I gently straightened the phone and have been careful about how I pocket it since. That cleared it up. Not a frustration so much as an irritation.
Other phones I've thoroughly enjoyed for what they are, in order:
5. BLU Win HD LTE - it's got style and is a great budget alternative to Lumia.
4. Lumia 928 - it's feeling its age about now (more so than 1520), but good all-around and Xenon Flash is a nice experience
3. Lumia 640 - got mine for $30 US and it can't be beat for value at a low price.
2. Lumia 925 - I still miss the low light pictures this phone can produce. It was the best at one time and still worth a look. Looks nice too.
1. Lumia 830 - solid all-around. Dig the style on this one tremendously, especially with the different color backs that are easy to find and swap in. The camera will shoot with the big dogs, IMHO it gets overlooked when it shouldn't as the versatility of range with the camera is superb.