My favourite is definately Dogma, but I'll be controversial and say Jersey Girl is my second. I thought George Carlin was brilliant in that, his sarcastic one liners and just some of the faces he pulled were hilarious.
The whole Sweeney Todd thing was great and typical Kevin Smith humour.
Think the problem is everyone panned it because of the bennifer/gigli fiasco, but J-lo is hardly in it (and she was ok anyway) and I think there was really good chemistry between Affleck and Liv Tyler.
A RomCom with Kevin Smiths humour, it ticked all my boxes even if it didn't have Jay and Silent Bob in it.