D15AV0W3D over at The Hushed Casket tries to put all three Halo games into perspective, but generally, he thinks Halo 3 corrected a lot of the issues in Halo 2:

Enter H3, the end of the trilogy, and Bungie's triumphant redemption to the lackluster campaign on H2. Enter more user-customization than ever before. Map Forge, Theatre-mode, and more. It has possibly more bells and whistles than any other console game, ever. But are the multiplayer extras and customization enough to win over the H1 fans? The auto-aim was turned down, but is it enough to make the H1 crowd forget about their beloved scoped pistol?

In my opinion, H3 is better than H2, hands-down. Absolutely no comparison. I think most reading this will agree. The auto-aim was turned down significantly. I played some H2 last night, and after having played H3 for two months, was struck by how strong the auto-aim was. I like this about H3. Less auto-aim requires more skill, and rewards skilled players more than H2.

See THX for the complete text.