Was there a game that kicked off your fascination with the actual creative process? For me it's got to be Ratchet and Clank, I got my PS2 with like 4 games but I spent most of my time during the first month playing Ratchet and Clank 1 on the demo disc. Ratchet and Clank was the first game that I felt I could really see that living breathing people had poured themselves into making something, everything had so much character, pretty much all other games were just what they were, games, never thought much about how they came into existence. I probably wouldn't be a programmer today if it weren't for that game, honestly if I had the skill and resources I'd probably make a game that felt just like it.
I'm only saying this cause I just got the remastered original trilogy for PS3, one of the best remasters I've ever seen without a doubt, and the games have proved to not just be glazed over with nostalgic love in my memories, they are just as good, if not better than I remember.
Also, my favourite soundtrack, what a unique blend of quirky electronic and orchestral music (the latter is more predominant after the first game): http://www.youtube.com/watch?v=VjGxXK_ltcs