#3 Versatility
To succeed and thrive in this business you have to be extremely versatile, and Sami Zayn has that down to a tee.
He can transition between a happy-go-lucky babyface and a serious badass within seconds. If you need proof, just go back and look at his match against Shinsuke Nakamura at NXT Takeover: Dallas - because you'll see an entirely different side of the former NXT Champion.
But that also covers microphone work, too. Sami has never been overly praised for his work on the mic but that doesn't matter to him, because anytime he's given the opportunity to shine he does just that. He's funny, he's passionate and most importantly he gets people invested.
With all of those traits, he draws a few comparisons to another former underdog - a bearded gentleman, perhaps? Onto one of those aforementioned traits that you just can't buy.