After scrolling through Sandler's IMDB it's kinda shocking...as many guilty pleasure and downright bad movies that Sandler has made; he really has never made a bad "serious" movie...he's so capable of doing excellent stuff when he works with good director's.
Also, it's pretty amazing how much $ he has made for his buddies...
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When he wants to, he can put out good movies. He likes making the movies that he makes. He's incredibly comfortable in his own skin.