Zack and Miri didn't have them either and Jason Mewes actually played a completely different character in "Lester the Molester". That's why that movie was probably my 2nd favorite next to Clerks, it was just so much more original than the rest. Even though that movie didn't really take place in the same "universe" as the rest of his movies, but that was alright for me.
Cant believe I forgot Zach & Miri. Shocked to find out I had never heard of a Smith movie too.
Personally Mallrats speaks to me, do you have any idea how many times superhero penis comes up in conversations with comic book geeks?, I know many of the characters are based off his friends(like Brian & Walt from Comic Book Men, and that Dante is based off Smith himself), but it seems like a lot of the comedy is based off a conversation, or event that did happen to either him, or a friend, and I am almost certain the story for Clerks 2 was about buying The Secret Stash, Smith's comic book store.