Hi Jill,
I did the PFI course. Kirk knew he was teaching free dive spearos. He emphasized what you said, that he will focus on performance free diving, but did make concessions knowing that we'd use a bit more weight in most cases. And that we DO look down on descent more than we should etc etc
But, there are differences in students. If you take someone from the midwest with little to no ocean experience, no real swimming experience other than how to not drown, going straight to scuba is a big jump. In this case, Naui, PFI Beginners or just a snorkeling course would help a lot. Just getting used to a mask and snorkel and fins is enough to start them off.
On the other hand, I've taught a few guys that grew up in Hawaii surfing, body surfing....lots of water time and ocean experience and basically had to teach them, "never hold your breath and go up slowly". And they got it right away.
Why the hell are you in Phoenix after diving all over the world? You hook with some cowboy that was on a diving vacation?
Phoenix is home, the rest of the world is a playground. Although, I've met a few scuba cowboys...
I hear you about looking down. I want to see the bottom. It's disorienting to be diving in blue water (or worse black water) with your chin tucked trying to look at a white line. But it does make a huge difference in streamlining an effortless descent. And the instructor said there's a danger of some kind of throat squeeze when you look down.
My class was all spearfishermen too. And ab hunters. I felt a little left out being the only scuba diver in the bunch. Even though we're all ocean lovers we had nothing in common. They're hunters and I am a tourist, plus I have a lot of scuba habits that are hard to break.