For me the one card I have deemed as my favorite had been the Orr "goal" card where it's a triple memorablila card. Someone ahead of me already mentioned it but the top 10 goals or goals that changed the momentum swing of a series or Cup finals. Or the most memorable goals from the playoffs.....
-Like the Theoren Fleury goal when he was with the Flames.... after he scored he slid across the whole rink on his knees
-The Tikkanen goal that went top corner to clinch that game with the Flames
-The Gretzy goal where he rifles it top corner in one of the series
-There was that Yzerman goal top corner that went in...in a HUGE playoff series
-Maybe the Lafontaine goal in the longest overtime in playoffs
That sorta thing....
