Mine was Pulp Fiction from Play.com, which I only discovered the other week has THE most horrific dent in it! That's what I get for not looking behind the J-cards
I've had Star Trek DVD steelbook for some time, then HOMAM VI steelbook (game), but what started the steelbook craze for me was Snow White and the Huntsman Steelbook, which arouse my interest in them and I was hooked.
think it was Wanted as it was the same pre-order price as the ordinary version.... was the same reason I got a few more after that including Star Trek which was all well before getting into collecting them properly within the last year or so