At least the good thing about photography is that you can make money out of it by selling pics! Which is probably harder with audio gears!!
Concerning sensor size, surely the absolute quality is better with bigger sensors, but in the end I’m more into user experience, and with the fastest glasses, I already have enough control for my purpose. Once printed you’ll be hard pressed to find any significant differences, unless you print really big.
Anyway, here isn’t the right place to talk about that, but I’ll be glad to pursue this discussion with you by MP if you wish!
Edit : in the end I think an analogy could be made with audio! You are happy with your “small” iPod because it brings you satisfaction with the user experience and suits your needs, and you don’t feel like trading that for a little improvement in SQ. The law of equivalent exchange, here we go!! Haha! Those two hobbies are indeed very similar!