Your favorite game genre...
Puzzle - Myst series, #1 by a slight margin
In puzzle games, like Myst, I spend many hours outside of the game working over my notes. Myst depicted a fairly consistent & somewhat viable alternate reality that spawned many dedicated forums for in-depth discussion, which is fun and interesting, too. I very much enjoy the challenging intellectual exercise, even when it leaves me feeling like Charlie Gordon at the end of his tale. :facepalm:
...along with your favorite game of each genre
RPG - TES series
Shooter - ?
RTS - Age of Empires
Action/Adventure - Fallout3 (arguable, yes, but that's how I played it)
Simulation - Sim City Series
Sports - ?