Hmm... I've never bought Halo, but from what I've played at mates houses, etc, it didn't really impress me. I'm not a multiplayer person really (I mean, I've played Burnout Revenge online which was good, and I've played Unreal, and Source online, but yeah...minimal amounts) and I think Halo is more geared around online play. Isn't it?
Don't think I'll pick it up though. As for waiting for games, my minds set on Crysis