I started diving in 1966
Got my last certification in 74 for mixed gas.
My favorite dives are cave dives using a rebreather.
Not on my own but with guided groups. Those rebreathers are too damn expensive.
Used to dive a lot more when I had a boat (36ft Tollycraft) and loved going out to Catalina and some of the farther Channel Islands.
Deepest I've ever dived was 507 feet. That was with a couple of buddies that were US Navy Salvage & Construction divers. It was mixed gas controlled from inside the "construction shack". And upon surfacing (inside a transfer bell) we were slowly brought up to surface pressure. It took days. I couldn't qualify medically to do that these days. The Navy medics put you through a huge series of tests. Having dental work (crowns) can disqualify you as can nearly any spinal surgery. Imagine what the pressure at depth could to do to you if you had a void in a tooth or spinal disc.
one of my greatest regrets in life is that i was supposed to dive in the great barrier reef in autsralia. we got shit faced the night before and missed our bus to go diving. I still regret it to this day.
Go back and do it!
give me 10G's..... and i'm on my way :beer: