Yep I echo the GUE set up.
So 4 d rings 2 on chest one on left hip for spg and the 3 on the crotch strap for clipping a scooter to, though I often clip my camera off too it when required. Whilst this is a little untidy, as the camera dangles below you, it has the advantages of letting you keep an eye on your camera and not letting your rig bump into anything.
2 x pockets on legs contain on all dives, smb and finger spool, back up mask and wet notes.( I am surprised by how few people use wet notes, I find them unbelievably useful and aside from letting you note things underwater, fish species etc also allow you to communicate on a whole other level).
Photo wise I ll also cram snoots, reflectors, diffusers or anything else I happen to be experimenting into my pockets.
This set up works for every style of diving I have tried from reef, cave to deep wreck, so it s pretty flexible.
happy diving
e