coz he makes the same type of film with the same charcters and the one time he didn't it flopped?
I do see your point, specially now with Clerks 2 coming out.
But 2 things do it for me:
1) I don't care if he is coz the films he makes, same or not are hilariously funny and intelligent with killer casting
and 2) Jersey Girl was his only film out of the view askew world and it got panned but I liked it myself so I reckon he could do other films, non jay and silent bob involved but he doesnt get the chance to.