I think my BIL has it.
In his 30s, mostly lived at home, failed stint in the Army. Multiple start/fail cycles with family and friends helping him into work, extremely stressful for all involved. Long-term unemployed.
Ideally he would sit in the house or garden all day, reading old books and watching old DVDs, basically avoiding any of the trappings of adult life. As long as he could eat and sleep, he wasn't bothered about much else.*
He was literally not bothered by what he wore, where he was clean, whether he paid board, whether he owned anything of monetary or sentimental value. Basically happy to bump along doing not very much at all.
He became increasingly verbally and physically aggressive over the years, eventually assaulting my PILs and worse.
I don't actually know if he was diagnosed with PDA but he definitely has a schizophrenia diagnosis, and depression. With the worst of his behaviour, it wouldn't surprise me if he were to be diagnosed a clinical psychopath.
It was the PDA that I first came across as the potential answer for his very challenging behaviours, possibly 10 years ago. All of the other diagnoses have followed.
Whilst I'm sure all people with PDA are different, he'd be an awful partner. He's a terrible brother and a bad son. Fortunately he's never had a partner or any DC that we know of.
He's actually quite charming and gentle when you meet him at first, but he couldn't be more manipulative. It's not that he says no, it's that he says yes, and then does the opposite in an unexpected way, that often has dire consequences for those around him. He's not lazy, he often goes to incredible lengths to avoid the thing he doesn't want to do. But because he has nothing... no stuff, no home now, no real relationships, he has nothing to lose in his eyes I'm sure.
- Had lots of substance issues though... cannabis, alcohol and eventually crystal meth.