For me, it was Christian finally winning the WHC against Del Rio. Asides from the general good feel to it, seeing him apparently getting his just rewards after all his contribution to his craft, the added poignancy of sharing if with the (just retired) 'brother' made it that extra special.
Had he been given the same creative support that Punk subsequently received, I feel that this would have been a sure in. However, I put it to you, my WZ colleagues, that as a stand alone 'moment', this is easily the winner over a nostalgic 'pop' for a guy whose interest appears less than complete or a 'shoot' that alienated as much as it excited.