I too would say I have good instincts about people, and always act on them. DH takes my instincts seriously too, especially since I made him turn down a couple of contracts years ago that looked lucrative but ended up making the people who did take them go bust.
The only time I can say with certainty my instincts about an individual were spot on was about 25 years ago when I was waiting (and waiting) for a bus in a London suburb late one evening. A middle-aged lady in a car pulled over and offered me a lift, and in all honesty I might have been tempted except for a really bad feeling, not even of danger prticularly but just of darkness or badness. I said no, not a problem, and she pressed me a bit, saying she'd feel bad if anything happened to me ('you read such dreadful stories' etc). It sounds hokey, but it's the sort of thing I would do now if I saw a young women stranded somewhere at night, and it didn't seem suspicious at a rational level but I just had a really strong sense that I was safer at that bus stop. Anyway, to cut a long story short, it turned out to be a man presenting pretty bloody convincingly as a woman, and he turned out to have a string of sexual abductions to his name.
That's the only time I've ever known for sure how the story ended, but I get 'bad feelings' occasionally about people or situations and I always pay heed.
I also have a strong nose for deceit. For instance, a friend's DH recently confessed to an affair and this is a guy who you would have put money on never ever being unfaithful. But somehow I knew, almost like being psychic. I had to wait while it all played out over nearly two years before coming out into the open, because there was nothing concrete I could point to, just a certainty.
I've wondered if that kind of 'sixth sense' is related to being autistic. As an aspie, I've learned to construct the world's largest (it sometimes feels!) database of human behaviour in my head, so I can check people's actions against the prior experience of a lifetime and make a quickly calculated decison about how to respond. The older I get, the more comprehensive the dataset and the swifter the calculation - too swift to notice but based on experience rather than anything more woo. I was pretty naive as a youngster, which backs up this idea to some extent. I'd be interested in whether any other aspies relate to that as an idea.