Yes. Either hardware or captive. I *hate* software buttons. Especially the way my Android phones handle them
This:
http://i.imgur.com/TC3iwgj.png
http://i.imgur.com/O4T77nyh.jpg
The way it just moves to the right side is *extremely* annoying, especially for left handed people like me. And I doubt Windows Phone would handle it much differently.
I see absolutely zero sense in on-screen buttons, unless they are configurable. Since this is WP, they probably won't be, so why waste pixels on the screen for buttons when you can leave them on the bezel? On 925 the bottom bezel is only slightly taller than the top one, and it doesn't bug me at all. I also hate it how on my Nexus 7, virtual (on-screen) buttons go into landscape when I move the tablet, wasting precious pixels (there's only 800 of those and a lot of screen is wasted for buttons and notification bar).
Hardware camera button is the best thing that happened to camera phones. I had one on Arc S, but it was positioned so awkwardly that I never used it, I almost dropped the phone if I tried to press it, on Lumias, it's perfect. I don't care much if it stays or not on cheaper models, but a PureView without a camera button is a waste of technology. I take all my photos with the hardware button on my 925.
I never even thought about lefties, do they always move to the right, if you rotate it +90 or -90?
I could care less
I could care less for the back, home and search buttons. They could put them anywhere. What I would like to see are send, end and camera physical buttons.
Do you mean the 'green phone' and the 'red phone'?
Camera buttons needs to stay. I'm not buying a phone without it
They won't take up additional pixels as phones made for WP8 will require extra screen size and higher pixel count (54px I believe) for the buttons.
Yes. I believe the primary purpose of a smartphone is to make and answer phone calls. It shouldn't involve so many steps.