Who can forget Lt. Reginald Barclay's Walter-Mitty-esque role-playing on the holodeck, or Troi's outrage when she found herself typecast in his fantasy life as the Goddess of Empathy?
This did seem, however, to typecast him into playing psychopaths.
typecast role with another dinner jacket and a Walter PPK.
typecast the actor.
typecast as a villain, the work kept streaming in.