Is not not worth having a bit of a straw poll see how everyone feels about this first?
While I don't contribute much, I find the list traffic manageable. Also, I get to hear about parts of pd that I wouldn't unless I was on the list. So I vote for one unwieldy [often OT] list.
While I generally avoid "me too" posts, since this is a "straw poll", I agree with the above, I prefer one list.