You can be considered an "other" not only for not making consumer choices, but for political and religious views as well. That's just the way people are. But just as you are free to pick your religion or your politics you are free to pick what you buy.
For a bamboo cutting board vs plastic, for a few dollars difference I wouldn't sweat it. Also, the bamboo board does have one important feature. It won't hang around in a landfill for the tens of thousands of years that it takes for plastic to biodegrade. Perhaps that was part of the reason for purchasing bamboo. That is a feature (one that you can't even experience in your lifetime) and it has a value.
Touch screen phones: this whole category is transforming as we speak. The touch screen enables the phone to be used easily as an information device. Cell phones are rarely used for calls any more. It's all texting to communicate and mobile browsers for getting information when not near a computer.
Cars with DVD players: can you put a price on keeping the kids quiet in the back seat?
Black Friday: I don't take part in it because I am Canadian and this is an American phenomena. But from what I see on the news each year, the big event is fueled by the drive to get low prices. The same products were in the stores the day before, but there was much less interest in purchasing the day before at the regular price. Although it looks completely irrational on the face of it (e.g. people lining up over night) it actually shows how price is a big factor in purchasing decisions. It is rational to seek the lowest price you can get for a product. If a low price means more to a consumer than other factors, such as the overall hectic and busy shopping experience of that day, the consumer will be out shopping on Black Friday.