Mostly hit and miss. His stuff was funniest when I was a teenager, around fifteen. His movies are all so bloody similar there's little point in watching more than one.
Let's see; Sandler plays a slacker-loser who loses his job/girl. He's surrounded by an assemble cast of odd-ball friends, specifically Allen Covert, Steve Buscemi, and Rob Schneider who encourage him to get it together. In his pursuit of improvement he meets and falls in love with a likeable female lead, often played by Drew Barrymore. Sandler spends much of the movie fighting the "establishment," proving nice guys don't finish last, and the little guy can make a difference, all the while losing his temper. Everything wraps up neatly in 90 minutes.