I'd keep an eye on Barron. The others seem reasonably well adjusted, but I'd definitely be keeping an eye on Barron. Trump's parenting was almost certainly absent (because busy) so it was left to the wives/mothers to model according to their blueprint. I don't think Melania has a good blueprint - we'll see I guess.

I'd also push back on the fact Trump has friends. What evidence do you have for this? Tom Barrack is persona non-gratis after 30 years over a relatively small issue. He might have acquaintances. Ricky has plenty of people with whom he is friendly, he doesn't have friends. There's very much a distinction between the two things. If he does have people who are currently 'friends' that relationship is likely transactional in nature and that person is an emotionally expendable placeholder.

Agreed, Trump is not psychotic.

The problem with 'knowing what you know' and making decisions in this way is that it's great for business. You get an intuitive gut feeling about people, projects and weakness. I'm not sure it's great for long-term strategy. Trump might be great in the moment, but a history of failed projects suggest his long term planning isn't stellar. He's strong intuitively, but weak at strategy. That'll undo him in geopolitics.