Whoops. Glass looks nice. Anyway, plastic > metal if a case is used. I think many of us will use a case since protecting the phone for reselling or long term use is more important than the looks (some may disagree). The Nexus 7 looks great in plastic and that comes to show you that design means more than material. Plus with the design techniques we have now, we can make plastic look like metal (i think). So if you dont feel like your tech is less valuable without the metal, plastic is fine.
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You are a winner. I'm in the same boat. Give me functionality over "premium feel." My case for my ipad feels more premium than my ipad without it (and it cost $30).