My favourite match has to be the 2010 Play-Off Derby which saw us beat Hull FC 21-4.
I was at my girlfriends (now wife, some how) sisters wedding during the day. I left the wedding to attend the game, then returned to the evening reception after the game. I was fully suited, with a white shirt and red tie, obviously.
I returned on the evening with my red tie, tied around my head! Did I mention my brother-in-law is a Hull FC fan? He's had his own back a few times over, mind you haha.