beating HALO:CE on xbox in coop with a friend of mine was a great part of my childhood. i missed the series up until halo 3 in multiconsole massive bloodbaths, and then my friend decided to get halo reach. we're currently trying to beat them all in legendary before halo 4 comes out.
by far my favorite gameplay and storywise is reach (yeah, go on, flame me... just kidding). but since the 10th anniversary edition of halo:ce came out, it gave a good feed to my nostalgia, although i prefer reach's gameplay (personal taste)
just so we're on the same page, i do prefer my FPS' on pc, but with halo's portings, i'll make an exception (or spend 200+ bucks on a keyboard and mouse combo for the 360... maybe)