Atari 2600 -- Seaquest. It was just plain and simple fun.
NES -- Double Dragon II. First game I ever "mastered", where I could just about beat it with my eyes closed.
SNES -- Final Fantasy VI. This is the first game changer for me. I was burned out on the same ol' platformer and brawler type games that seemed to make up 90% of the titles back then. I didn't really care about gaming very much. Then, by pure chance, I came across FF6 in a used game store that I was only in because a friend wanted to pick something up. I didn't even know there were more of the Final Fantasy games beyond the first one, which I'd owned and loved on the NES. It completely grabbed hold of me in a way no game had ever done before.
PS1 -- Final Fantasy Tactics. I bought it because it was a Final Fantasy spin-off but who knew it would probably become my favorite game ever?
PS2 -- Gran Turismo 3: A-spec. Another game that just blew me away and owned my life for months.
Dreamcast -- SoulCalibur. This game ruled so hard at the time, it's hard to even explain. It was such a magical leap forward that I will always think of it as the best fighting game ever made relative to the era it was released in.
PS3 -- Valkyria Chronicles. First PS3 game I beat and still one of the best on the console. I loved the story, the characters, and the game-play.
PC -- World of Warcraft. I spent years playing that game. I still think it's the most monumental achievement in the industry. It's absolutely massive, with a breathtaking amount of content. Even people who do not like MMOs should respect the amount of work Blizzard put into WoW.
