We do have some choice (ok, barring the free wil debate, which is for more than I'd like to go into), but we are also largely effected by our cognitive and biological biases. For some easy to dive into examples, check out http://youarenotsosmart.com/. Don't take that name as an insult; it's a fascinating, well written, and yet easily digestible look at the myriad biases we all have. I think we have a lot less choice than we like to believe.