I am new on this Nexus 5 subforum, but maybe a few people recognize me from the Nexus 4 subforum.
My Android adventure started with the HTC ChaCha which was a fun, little phone, but nothing in comparison with the Nexus 4 I got after it. I was very impressed and it convinced me of Android's power and functionality. Now today I started using my new Nexus 5 and I might share some experiences I will have with it.
So far, I'm overall quiet happy with the build quality. I can't say it's perfect and I don't get why the USB charging cable that comes with it by design scrapes the unit, but it's not a very big issue. (Still I don't get why LG designed it like this, you buy a new device and right away it gets damaged by it's own charging cable) The back feels nice, soft and it doesn't feel Samsung cheap. Power button and volume button could have had a bit tighter fit. And the front camera is not perfectly centered. In person the camera and letters on the back are actually pretty nice. But the ring around the camera collects dust immediately.
Photo quality is good enough for a mobile phone for me. For real photos I use my dedicated camera and I would do the same if the pictures were better. (iPhone-like)
Sound is not as bad as I expected. The little speaker actually goes pretty loud, but with a very slight hint of distortion. (Emphasis: very slight, almost non-exist)
I haven't made any calls with it yet, but I will add this later. The call quality of the Nexus 4 is one of the reasons I upgraded. The buzz(!) and overall not very impressive.
Battery life is the other reason and I hope I will not be too disappointed. But the rumors of the Moto X + 1 having a ridiculously large screen pushed me over the edge.
The build quality is not perfect. There are little imperfections, but it's to be expected at this price point and the unit doesn't feel cheap when using it. Vibration feels/sounds a bit odd to me, but it's not bad per se.
Other new Nexus 5 owners are welcome to share their experiences in this thread as well.
If the rumours aren't true, then my preference for the next Nexus phone would be to have HTC as manufacturer. Second choice: Sony.
Nexus phone made of aluminium and with stereo front speakers? Yes, please. But please leave the ultrapixels for the HTC premium phones, lol!