Oddly enough, underwater photography has made me a beter diver. I'm more patient and less self concious underwater. When I was still a novice, I was always overly aware of the mechanics of my diving and it tended to take a lot of air out of my tank as a result. After I became more preoccupied with my camera and looking for the little details, I became much more relaxed underwater and learned a lot more quickly to get my buoyancy right because that enhances your photography abillity. I have also learned to really enjoy the little things on the reef. So many creatures are there but many are very tiny. It takes patience and the abililty to hover in one spot to truly appreciate them.
I like a nice slow drift dive myself. I like to have my octopus and gauge in close to my body because that makes you more streamlined. In a sense, SCUBA is the closest the average person can get to being an astronaut and visiting alien worlds. Total weightlessness- it's like flying in some senses. I really enjoy it and whatever I can do to get an extra couple of minutes out of a dive (relaxation, streamlining, not diving deeper than need be) are things I strive for. It pays off. If you're patient, you can slip right up on a turtle or a sleeping shark or a stingray without agitating it and get a choice view (and photo) of it.