I absolutely hate the saying "you only regret the things you didn't do when you die not the things you did". Really? I suspect some aids victims regret things they did. I'm guessing meth addicts also regret somethings they did. I don't see how this cliche helps you decide what to do and what to avoid.
For a less dramatic example my father recommends choosing a high paying job that is not so interesting over a more risky job that's more fun. His experience is he took the a risky job, though whether it was fun or not I don't know, the risk didn't pan out. Now he's 69 and driving a delivery truck because he can't afford to retire.
It would be nice to hear more failure stories to contrast with success stories