I'll do a shallowish non deco dive with most people who aren't obviously a total window licker.
As it gets deeper - I get fussier. Some people would argue not much fussier - but fussier

There are a few non GUE divers I'd do a deeper dive with - but they're in the minority. Its just easier with people who are trained the same way as me. Why make something that's supposed to be fun hard?
Its all here: some of the world's finest Instructors, equipment and buddies.
You've got to want it and be prepared to make the effort - but if this is what you choose - I promise you wont even look back for a moment.
I can't recognise myself as a diver from two years ago. The guys in my team will tell you that if I went on a diet maybe I would
With respect Alun - stop making life hard for yourself - you clearly think this way of diving will suit you - you've got nothing to lose and everything to gain.
If you wanna hit a quarry with one of the guys sometime just say so and either myself or someone a bit closer will be happy to oblige.
HTH