Re: How come the TNG cast is the closest of all show casts?
It doesn't really matter if the casts are buddy buddy are not. Is it a nice bonus as a fan to know that they get along? Sure. But they're actors, as long as they act like they are supposed to, I don't really care.
Professional actors are required to do just that - be professional. It doesn't matter how well they gel personally, because the only thing that we see is what is filmed and edited, and that being what is scripted and shot.
"Well..some people should never be promoted." - Garak