My feelings on Kevin Smith movies are mixed. On the one hand, they are always entertaining, hip, and hilarious. I probably like Jay and Silent Bob Strike Back best because it's a pure comedy. No "message."
On the other hand, many of his movies have some very amateurish qualities. His dialogue is often...what's the word? Contrived, over-written, unnatural, too-clever.
Chasing Amy was cringe-worthy. It should have been a movie about people who write comic books. The love story was melodramatic to the point of silliness.
Dogma is a mixed bag. Again, very entertaining. I especially loved the board room scene with Ben Afleck and Matt Damon. Alan Rickman was great too. But it was also disjointed and cluttered with unnecessary characters.
He also insists on piling all his regular actors, his friends, even his wife, into all his films, whether they belong there or not. It's kind of sad when Jason Mewes comes off as the most authentic "actor" in your cast.
I haven't seen Mallrats or Jersey Girl, so I can't comment there.