I love Ifill's because of the context of that game - he had tried so hard for 105 minutes and was absolutely out on his feet but somehow found another gear and was the reason we went through. Brilliant.
Felipe's stands out because it was the first real goal from us where I felt I could say it was 'great' and not just bundled in.
Big fan of Rojas' goal here:
http://www.youtube.com/watch?v=AE4hY4Veh0Q
And Smeltz' here against Melbourne too
http://www.youtube.com/watch?feature=player_detailpage&v=Vr-PuzJbmiY#t=134s
Also the goal where Kosta back-heeled but can't find the video anywhere. Brockie with a few screamers this year too ( 2x Melbourne and the 1 against Brisbane too)
Eugene Dadi gets the vote for most spectacular debut. Still remember that game. Too bad it all came crashing down at Perth.. Still loved the guy, though.