ANY true dive pros can use any bc anywhere!!!! Said a lot about the diving ability or lack of it of the pros in your shop!!
I use BP/W but will use anything eg. jacket bc when I travelled lite in Philippines and Thailand. So a amateur like myself has better skill than any pros in your shop.
Exactly. When doing pool training I use shop equipment to protect my gear from chlorine. I'll use whatever BCD is left on the rack (within reason) after making sure students have adequate/appropriate gear. It's likely the oldest, most decrepit BCD that's not quite my size but it's fine for me as an instructor. Better that students have the best stuff.
But I do have preferences and so use the gear I want when actually diving in the ocean or lakes. A quick count suggests I have gear from about 15 different manufacturers on me when I hop in the water, and another 2-3 backups in my truck. Here's the breakdown:
Reg Set: 2 different manufacturers (the SPG is the odd one out)
BPW: 2 (non-standard weight pouches, but those are same as weight pouch manufaturer), not including bolt snaps
Drysuit: 1
Undergarment bits: 2 (gloves are non-standard)
Hood: 1
Fins: Same as reg set
Mask: 1
Snorkel: 1 (not counting the non-standard keeper)
Tanks: 1, though backup tanks and pony (if used) adds 2 more
Computers: 2
Dive light: 1 (weird Amazon special ) for day light dives, add 1 more for a night dive
Pocket mask: 1 (required for instructors)
SMB: 1 (I have a different one for situations where I think I might really need to deploy it to be found)
Knife: 1
Not sure if my dry gloves are made by the same folks as the suit it self. I think not, so that's another one....
I carry a lot of my own gear when diving tropically these days, but when I do rent I don't really care what I get.