Maybe it was memorable because of the game itself; your first and only triple ko, a dragon kill that could never be matched, a massive comeback. Or maybe it was because of the time and effort you put into that game; a game you spent months playing over by e-mail or by a turn-based server, a game that lasted for hours in a big tournament, a game you won over someone many stones stronger than you under-handicapped or not. Or maybe it was because of the person you played. There are many ways a game could be memorable, so here's a thread where you can post some of your most memorable games and explain why it was so memorable to you.
As for myself?