I haven't been invested heavily in a halo game since halo 3. I was really addicted to that. I played the story in ODST once, I played halo reach for a few weeks and stopped. I played halo 4 for a few weeks and stopped. They just don't... click to me anymore. Maybe its the mediocre map designs? I think its that. I can't think of any iconic maps that have emerged since halo 3.