I've just made the decision to go back to school and become a PT. I'm also a huge CF proponent. I've been doing it since 2004 and training people on the side for about 5 years. CF is awesome but also misunderstood by a lot of people. It's a very open program, which is great, but it also means there is next to 0 regulation. There is massive fluctuation in the quality you get from gym to gym and trainer to trainer. The best gyms/trainers all have a huge focus on form and quality of movement. The lesser gyms/instructors often have the impression that they can trade form for intensity, which is completely false. When you lose form, you lose efficiency, which then limits your intensity (and leads to injury which also obviously hurts performance). Our motto is to always seek best orthopedic function, in other words whatever our task is we will train and use the form that our body is most optimally suited to use.
In any case, even if you are not on board with everything about CF, one of the best things about it is how it has brought a HUGE amount of information into one place that is easily accessible to all. There are experts from all areas of health and fitness that have brought something to the table and it's there for anyone to look at if you are willing to sift through it. One person in particular that folks here might want to check out is Kelly Starrett. He is a DPT and CrossFit coach who has a blog called the Mobility WOD. It's all about mobilization/stretching to get athletes to be able to get themselves into the most efficient positions to increase their performance.