For me, I thought Halo single player was mediocre, with bits of excellence strewn about...but I have played much multiplayer with my brother and friends and enjoy it immensely...
I liked the ability to throw grenades without having to switch weapons...halo spoiled me with that...now when i play another shooter and i have to switch to grenades i start saying to myself "why can't they do it like halo?"
though UT2004 is still the best
