Curb your enthusiasm is a show about nothing just like Seinfeld was, but it's fucking brilliant. Entourage is a brilliant portrayal of the Hollywood underworld from the agents to the clients to the studios. To say it's only about guys getting laid and going to parties is like saying you've only watched it a few times, in other words your opinion is null and void.
Well Opie was right that the show simply didn't grow beyond a certain point. The B-story lines are usually pretty good though (those usually invoving primarily Drama and Turtle).
I used to love the show. The first 3 seasons were excellent. From then on the quality kind of declined. There is so much more than the partying and shit. It has a lot of funny moments. .