#1. Is a fan of - Seth Rollins
The very fact that Seth Rollins is being primed as Roman Reigns' replacement on top of the WWE mountain should be evidence enough that Vince McMahon has faith in Seth Rollins. The fact of the matter is that he's always been a fan of The Shield trio, very much including Dean Ambrose, who he shares a good relationship with.
However, McMahon sees a top star in Rollins, and it's no surprise that for many years, he was the second-most pushed superstar in WWE. If you watch the WWE 24 documentaries of Seth Rollins' 2016 comeback, and even the WrestleMania 33 special, you'll see that McMahon has a lot of affection towards Rollins, both as a person and as a performer.
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He's always praised him highly, and the fact that Rollins has managed to find a good balance as a babyface is one of the most likely reasons why he's being pushed to the top in 2019.