I know this is EXTREMELY difficult for a lot of people to understand, but try to stick with me here for a sec.......Plastic does not always equal "crap". I know it FEELS cheap, but it isn't always the case. The S3 kicks the shiz out of almost every single HTC phone ever made, and it's plastic. The HTC ONE will be freaking awesome, and the One X+ was on the same plane as the S3. There's no way that 40 million people would not only buy, but love their phone if it was a cheap piece of trash.
Everyone's favorite pasttime is to dog on Samsung, but it's tough for you to get a decent analysis of their product when you are lightyears behind. They have a lot of weaknesses and problems, but their flagship devices are almost never one of them. Glock uses polymer to make their guns. Everyone called it the "plastic gun" when it came out, and now the majority of worldwide law enforcement and military officials carry Glock. It is trusted, dependable, and it is quality. Nothing to shake a fist at. Don't fall into the same trap of assuming all "plastic" is "crap".