Gran Turismo 3: A Spec
Back when I was an RPG aficionado the concept of racing cars really did little to excite me. A friend lent me the game (having got two by mistake for gifts) and I promptly realised that what made me attracted to RPGs translated very well to the world of racing and collecting.
I have been a convert ever since, playing GT3 through GT5 and Forza 2 and 3, with Forza 4 undoubtedly joining the fray later in the year.
Magic: The Gathering
Remembering a fondness for the Pokemon TCG back in my school days, I bought this from the XBLA and was pleasantly surprised. I've since purchased 2012 via Steam and have been loving it even more.
Nice segue too; Steam.
I really didn't think I'd like the idea of never owning anything that I purchase, but what with the constant sales and the shining of light upon games that I never would have given a second glance to it has become the main staple in my gaming pursuit.
Not five minutes ago I dropped £30.00 on Civilization V x4 DLC Civs, Nation Red, Mount & Blade + x2 expansions, Defcon, Swords and Soldiers HD and Recettear: An Item Shop's Tale. A conservative estimate being 100 hours of play available to me - enough to see me through to Game Oversaturation Month.
Although I'll undoubtedly get more games in between... the only downside to the platform.