Back when Halo 3 first came out I remember going on several forums and getting different feedback. Some loved it, while a good portion said it sucked and that Halo 2 was better.

For me, Halo 2 introduced something new, while with Halo 3 it felt like Halo 2 with better graphics and some new additions. I liked it, but it just didn't impress me as much as Halo 2 did once I played it.