My all-time PS1 favorite. I could play that one for hours with my roommates in college.Ocarina of Time, definitely. A true masterpiece with an amazing soundtrack and story.
Anyone remember Demolition Derby? Man, that was a fun game too.
Different phases of my life so it's tough to tell but Goldeneye as a kid, COD 4 Modern Warfare as a teen/college kid and Skyrim as an adult.
At least for me, this probably be the toughest question I've had to answer at the hoop. And you nailed part of the reason why right there with the different phases of your life.
My favorite all time has to be Star Wars Galaxies.
My favorite box game is FPS lore: DOOM
Battlefield Vietnam
Battlefield 2
Battlefield 19742
Far Cry Original
Far Cry 2
In that order.