Dark with Mango, Red, Green, or Blue depending on my mood that week. I too prefer dark over light due to ease of reading in low-light situations, but sometimes I just like to switch it up with Mango or Blue. Against the black on an AMOLED screen, the Mango is really kinda cool IMHO.
In terms of visual appeal, white is a million times nicer (and I should say, more approachable) than black. However, the front faces of our devices are black, and white drains more battery on AMOLED screens.
If I had a phone with a completely white front face and LCD screen, I'd definitely go white.
Yes I do, its pretty normal even with lumia phones. So does with white iphones
Yep, I know. One of the advantages of black is you get this illusion of the screen being a part of the front face of the device, which doesn't exist with the white theme when you get a black border around it. I wish someone would create a seamless white device.