I'll give you my top 3.
Super Smash Bros. Brawl -- While horribly unbalanced, this game manages to be fun, simple, complicated, epic and awesome all in one ball. It's such a fun game to plah with friends, and it's easily the one I've had the most fun with.
Half Life 1 -- This game I've easily had the most fun with in a First Person Shooter. You can't not love Half Life unless you don't have a soul.
Marvel vs Capcom 3 -- Again, horribly unbalanced *cough cough DANTE AND AKUMA cough cough* but still a load of fun. And Deadpool is the funniest guy ever.
Super Smash Bros. Brawl -- While horribly unbalanced, this game manages to be fun, simple, complicated, epic and awesome all in one ball. It's such a fun game to plah with friends, and it's easily the one I've had the most fun with.
Half Life 1 -- This game I've easily had the most fun with in a First Person Shooter. You can't not love Half Life unless you don't have a soul.
Marvel vs Capcom 3 -- Again, horribly unbalanced *cough cough DANTE AND AKUMA cough cough* but still a load of fun. And Deadpool is the funniest guy ever.