I don't know what it is about me, but I have a sixth sense for losers who will not pay. There's been a number of times where acquaintences have taken contracts I've turned down (against my advice too) and have not been paid. There's something about slick communicators that just activates my spidey sense.

And TBH, I have also had a few false positives. One contract I did not take (it was for a mix of equity and cash) turned into a 10B+ company, and I would have made enough to retire (again) on it over a 1-year contract. I didn't because the founder who called me just sounded completely clueless and was barraging me with marketing speak instead of explaining what he needed. I was so exhausted from his BS I just decided I didn't need the headache. (This is also a danger of having enough to retire ... you turn down a lot of potentially lucrative work because you just don't think the headaches are worth it).

In the grand scheme of things, other than that one big missed opportunity, I haven't missed too much upside by being so picky. And when I'm counseling colleagues about their unpaid contracts and conflicts, I'm always silently thanking the stars I have the luxury to say no. I know that's a priviledge.