The Sirius stint felt awfully hollow. Dark Matter is the one era in which I can't go back and listen to those shows ... MITD too, come to think of it.
I never got to hear him on Sirius. By the time I got my radio and subscribed, which I still have but rarely listen to, Art quit.
I did like Art on MitD. Maybe it was the nostalgia but it was enjoyable. Not like the 90's though.