Miz and Mrs. works because both Miz and Maryse are fun and likeable people outside of WWE. they don't take themselves too seriously and are genuine and the audience can see that.
The Bella's show and Cena were annoying as hell just because of how fake all of them are. Cody and Brandi are more like this.
Jeff...my guy...it's time...
Mansoor the one friend that had one too many drinks