The Halo series is my preferred option. And actually not for the competitive multiplayer aspect, which I have grown to hate over the years. The marine interactions, large variety (and often scale) in combat and excellent story simply makes the games more memorable and replayable than exploring cleverly designed areas and defeat puzzle bosses.
In any case though, I think comparing the two is kind of like comparing ice cream with pizza. Both franchises are great and have their unique qualities.







