I did my first dive in 1994 and allways could dive if I said I forgot my open water cert. Got certified in 2010 and directly knew: I want to do technical diving, deeper than deep. 10 months later I was DM. Time to buy a twinset. My first 'tech' cert was in april 2012, my cavern,intro and full cave was also in april 2012 done, 18 months after open water, normoxic trimix was june, and my full trimix and first 100m dive 2 years after getting certified as open water diver. So I did all tech certs in 6 months.
When becoming instructor I wanted to become trimix instructor. Cave was a secundairy choice, as it looked to be a difficult path. But when I had the chance to do, I did. I have signed off 1 or 2 open waters, 5 advanced, some Dm's, but most of my certs done are in the adv. nitrox region or higher. I would have quit diving for sure if I had to stay within NDL and shallower than 30-40m depth. I like to have freedom to dive everywhere water is, shallow and deep, and caves.
On vacations I don't like guides and don't them. I know my own safety limits. A lot of divecenters are not used to divers with >300 dives, so experienced divers. This means I am not a big customer of commercial divingcenters. I normally rent tanks, sometimes pay for the boat (as taxi to the divesite), but don't pay for guides. If I only have to dive with divecenters, I would have quit within 150 dives. I am no muppet.
Happely technical divecenters most times understand that you don't need guides.
Not all of my dives are technical dives, but it gives me the freedom that NDL's are not for me, and I can go to wrecks or caves where not everybody comes. I do solodiving also, even outside sportsdiverlimits.
I dive with everybody, and I don't mind if you only like to stay shallow. But if there is an interesting divesite you can dive, and I pay for it, I want to do it. Divecenters must understand that the experienced divers have other needs than beginners. AND that solo is normal and safe also.
One time I was buddied up with an open water diver. But we went to a divesite where also a wreck was (35m). I told the divecenter: You know what I am going to do, deco, to the bottom of 35m, to the wreck, penetrate the wrecks and I don't stay withing NDL. I take the biggest single tank you have (18L). So if you agree that that open water diver also takes an 18L, and goes to 35m outside NDL, then he can be my buddy. Otherwise not. They agreed and we had a nice dive. And I was not responsible because I told them. But sadly a lot of divecenters think: ah an experienced diver, we can use his experience with another inexperienced diver.
But it is allways funny to have a discussion with a dm with just 62 dives that wants to tell you how to dive with all certs you can wish.
If you cannot dive on your own, you allways need a boat or a divecenter, then I completely understand why it is a transitional sport. I would have quit also. Now I can think after a day in the office: I want to go diving, take my car and jump in. On holidays I rent tanks, rent a car and go to caves. Or drive my own car to divesites. This is a big big reason to stay diving or quit diving.