>I've learned to pay close attention to what salesmen do, rather than what is said.
Yes this is always a wise thing to do.
>Most of them say nice things to be likeable, not because they actually mean or will do what they say.
I disagree with this take. I mean I’m sure there’s snakes out there. What I see in life though, is that most people don’t say enough nice things, even things they genuinely feel. They hold back from calling their dad or wife and saying “I love you”. Or giving a compliment to someone on the street if you like their outfit that you can tell they put time into.
I think a lot of salespeople are just good at “opening the gates” a little.
Personally I’ve been on a quest to be less stoic when it comes to expressing joy, and I highly recommend, especially for typical computer science personalities.