There is only one useful thing the Meyers-Briggs test does, and that is to promote an understanding that different personality types exist and can deeply affect how people interact with the world.

My workplace uses it for that, a training/development thing, every few years. I managed to beg off, the last time we were subjected to it -- pointed out that I'd gotten that message the first time I'd been through it, and it wasn't a particularly novel concept even then. This one is a colour version -- admin types are gold, R&D are orange, sales are green, someone else is blue; something like that.

After the last run, I was chatting with one of my colleagues, born and raised in Ireland. He told me that his results were ambiguous: halfway between orange and green. I asked him if that was a northern Irish thing?