Before you join: how to tell when a company has a great culture

>A colleague recently chose one of three similarly generous offers strictly on the basis of how much he liked the team he’d be joining.

And he got to those 3 choices by eliminating all the ones that weren't paying enough or had other negatives that he couldn't tolerate, I'm sure. That was merely his final decision, not necessarily the most important one.

To put it another way: When you have multiple things that meet all the requirements, how do you decide between them? You look at things that are less important.