Greg Inglis was the best Qld Cup player I've ever seen. Shows the depth of Melbourne at the time that he came into Reggies. He won the Qld Cup Player of the Year Award (and Rookie of the Year award) off 13 games, before moving up to the NRL. Incidentally, he did it all from fullback.
I'd be interested to see the list of QLD cup rookie of the year recipients, Gillett, DCE & Inglis are the three I know of
Pretty sure Tom Humble got it one year, although that might have just been player of the year or leading try scorer or something.