I've always been a PC gamer. There was, however, a time period between early '07 and late '10 that my PC was a little out of date, and I gamed primarily on Xbox 360. The list of absolutely awesome games I enjoyed on that platform feels endless, and with the dawn of easy online multiplayer, Achievements and downloadable indie games, that console generation felt like a whole new world:

New IP: Crackdown, Gears of War, Bioshock, Assassin's Creed, Enslaved, Deadlight, Braid, Limbo, Splosion Man;

New worlds within IP: Ghost Recon Advanced Warfighter, Star Wars: the Force Unleashed, Halo Wars, Race Pro;

Next-gen sequels: Halo 3, Forza Motorsport 2, Call of Duty 4, Grand Theft Auto 4, Brothers in Arms: Hell's Highway, Red Dead Redemption;

Sequels within the generation: GTA4 DLC and GTA5, Halo ODST, Reach and 4, Forza Motorsport 3 and 4, Assassin's Creed 2 and Brotherhood, Gears of War 2

From 2010 onward I upgraded my PC again and slowly switched back to the mouse and keyboard, but I'll always look back fondly on the X360 generation.