I have heard conflicting reports about a person's true handedness based on whether he/she shoots left or right. Some people say for right-handers one should choose a left shot stick as the top hand is the one that will controll the stick thus for lefties, one should choose a right shot stick. But then some have argued that the bottom hand gives you the power in your shot & stick handling thus if you're a lefty you should be picking a left stick and vice versa.
To be honest I don't know which is the more accurate assestment but personally I am a true right-hander (writing, holding eating utensils, etc) but I shoot left in hockey. Reason is when I picked up my first stick, I held in in one hand at the top which is my dominant hand (right) but then realized that it was too heavy to just be held with one hand so I got my other hand to support it and thus made me into a left shot. I see that most guys who were/are in the league who shoot left are right-handers (i.e. Gretzky, Messier, Crosby, etc). While a significant amount who shoot right are southpaws (i.e. Neely, Fleury, Blake, etc).
Both assessments have good arguments but I guess my take is just pick the one that you are most comfortable with.
Nonetheless I would love to hear everyone's opinion regarding this matter.