His earlier work was pretty good. Back when he was playing the lovable goofball. Unfortunately, it seems like his ego has worked its way into his films, making them awful. Not only is the comedy basically on autopilot, but if you notice, Adam Sandler is either playing the chick magnet or the guy who's the best of the best at whatever he does. It's just unrealistic and takes you out of the film.
Like in Grown Ups, everyone else has a pretty normal life, but Sandler has the hottest wife and mingles with the stars (I believe he was an agent.) Or in Chuck and Larry, no woman can resist him and he is shown having had sex with multiple models at one time, even though he's just an average looking firefighter. Or in Pixel, he's the best at arcade games and no on can beat him. Well, unless they use nonexistent cheat codes.
Of course, I will say even though most of his movies after Big Daddy suck, he still has some enjoyable ones every now and then. Anger Management, Click, and 50 First Dates probably being the most notable ones.
