Second this - er, looks like I'm third, so far.
Clearly, nothing could be more true than saying it comes down to the instructor. Unfortunately, nothing said could be less helpful, either. (I do appreciate the intention to be helpful, though, and thanks for that.) I guess it's just hard to answer this question without naming names, and people here (sometimes competitors) avoid doing that, understandably.
A specific question that may be easier to answer:
My interests in technical diving probably end at "techreational." To me, that means it's mostly about making me a better/safer recreational diver without having a black box in my knowledge when the NDL timer ticks to zero. I can see me using deco to nudge against NDL margins more safely on multi dive days (and maybe one enriched bail out/deco bottle). I reserve the right to change my mind, but I don't see trimix, deep wreck/cave penetration, or complex multiple stages in my future. Maybe doubles someday, for added loiter time (photography) rather than added depth - that's someday but maybe never. As an aside, I'd also like self-sufficiency training (for the added safety, I won't be diving solo).
From what I've read, it sounds like I aspire to something akin to Tec40/Tec45. I got my OW from PADI decades ago, but in my current incarnation I started over with SSI (AOW + basic nitrox) because what seemed like the best school in my area was SSI. But, neither my current school nor SSI in general appears to be a wise choice for anything technical. Fortunately, I can travel.
Q: Is the course structure of one of the certification agencies better suited to techreational aspirants like me?
[Note: the answer I'm looking for isn't that it all comes down to the instructor! Oh, and it's not "Shearwater" or "BP/W" either... For once; just once...
]
Thx