Glass or metal, which 'premium' design material do you prefer?

Apple, of course, has utilized both "premium" material types over the course of the iPhone's existence. Google, on the other hand, might have been so perplexed what to use in its new Pixel phones so that they are unique but still premium, that it made them with half-glass, half-metal backs. This resulted in a bit of a schizophrenic backside look, and some very unique drop test results indeed.
Apple is currently utilizing metal unibodies in the iPhone 7 and 7 Plus, but is rumored to move to all-glass design for the 2017 crop, while Samsung seems poised to stick with the glass-flagship-metal-midrange scheme in the foreseeable future. That is why we wanted to ask you which of the two most ubiquitous "premium" chassis materials for today's phones you prefer - glass or metal?
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