Pulp Fiction is simply a classic. It has a lot of interesting philosophy, great dead-pan humor, great acting and a terrific plot. I've always been a sucker for movies that mess with either time or perspective and this movie messes with both.
By half way through, you're so engrossed in the story and the philosophy that you almost forget how violent it is, the bad language and sometimes truly horrifying subject matter (a horrible drug OD and the pawn-shop homosexual rapists, for example).
I remember going to that show and loving it so much that I made my mom go to it with me. About 10 minutes into my second viewing, I remember how harsh the subject matter is when John Travolta accidentally blows out someone's brains all across the back seat of a car. I look over and check on my mom, and luckily, she's laughing with the crowd. (WHEW...dodged the bullet on that one...)
At that point, it has truly become PULP Fiction...