I've never had any interest in playing HALO 3 because, eh, Halo, whatever.  But lately I've been on a total Firefly kick again!  I got my dvd boxset so started watching this weekend - it's been long enough - and what a fantastic show!  I even picked up the two comic tradepaperbacks that supposedly happen between the show and the movie.  I have no high hopes for those, but I'm in full firefly-mode.  Anyways, apparently there are 3 marines in Halo 3 voiced by the Mal, Wash, and Jayne actors (and having their firefly characters personalities) so now I got to play it!