I also have a 2012 Terrain, and I originally searched for and signed up for terrainforum.net here because I wanted to find out what people thought about colors, options, etc.
I was really on the fence regarding color, and trim levels, etc. Also I just like to chat with other people who own the same vehicle, and see what different things they do - what oil they're using, what their driving experience has been, what tires they're looking at going to when their stock ones wear out, etc.
I came over from the Acadia Forum after 5 years to see what I can learn about out new Terrain. I think pretty much the same as jennie......I also enjoy adding input every once in a while. These forums are mainly about people having problems with their vehicle and seeking solutions. We can all learn too, b/4 taking car to dealer if we experience similar systems. It is all about having opinions too and learn as we drive our vehicles. Some read their manuals and some just push buttons and ask for solutions. All forums can be very informative, which I choose to do.