I respectfully disagree. You are only referring to aesthetics, not actual quality. For example, the aluminum tends to scratch more than plastic. Plastic survives drops better. The removable back means phones like the S3, S4 are far more easily repaired than phones like the One.
I totally respect the fact that you PREFER aluminum to plastic but that hardly means it's built better.
Also, if what you are saying is true, I guess most people don't care about "build quality" as evidenced by sales of the Galaxy series vs. HTC.
Since the one hasn't launched yet it's impossible to see what people prefer yet. Yes plastic could be durable but anyone that closes their eyes and is handed a piece of plastic in one hand and aluminum in the other and is asked which feels better or more durable material I doubt many would say plastic.
We aren't talking about durability which can be argued to death We are talking about feeling cheap in your hand. No proof that plastic survives better. Depends on the type of drop and where it lands. I've used the galaxy 2 and immediately when I got it thought it was cheap feeling but at the time I did like the phone. I'm not going to argue this to death. You like plastic and I prefer the materials used to make a phone like the one. Since phones now are basically the same inside what more does a consumer really have to go by other than looks and small features like boom sound or feel, looks etc?
Sent from my amazing HTC ONE Quietly brilliant!