They forgot that movie with Geena Davis, too. He wasn't a total badass in that one, but he was funny as hell. I think the Chappelle's Show sketches with Sam Jackson (or the "Leonard Washington" character) in them are a good crash course in condensed SLJness.

Favorite LW quotes: "I'm from a little town called None-of-your-goddamned business."
And the scene in the Trading Spouses sketch where he threatens the psychiatrist: "Well then, confidentially, I am crazy, and I will kill you."

Too many SLJ quotes to count, but I enjoy shouting the line from A Time to Kill. I caught Pulp Fiction on tv in the bar at work and found that I could still do Ezekiel 25:17 with perfect timing. And I've also been known to use his line from the call to Marcellus Wallace re: the wolf, "Shit, negro, that's all you had to say." A fun scene because of how well he straddles the line between being pissed off at his boss and still somewhat afraid of him.