Oh please care to elaborate? Every game has a few really good levels and some dud ones. Has Halo 3 got every map/weapon spot on that makes it so different to other online FPS's.
Shamikebab I do agree with you about the mark out of a 100 rather than 10.
First let me say I didn't mean to come across so arrogant.
The reason Halo is revered is its sandbox coupled with the spine of every fight, the way Guns, Grenades, and Melee mix together, yeah its been done in other shooted, but no game has done it with such a finely tuned balance across all the components of combat.
Whatever weapon you use has a perfectly balanced cost and effect associated with it, this extends to when and how you mix your use of grenades and if you dual wield there again is a cost associated to it, that is balanced.
Couple this with the vehicular combat and balancing, unlike most other shooters the vehicles are integrated into the game world, they aren't there for a "section" and they all serve multiple purposes.
Ultimately Halo affected Console FPS gameplay design immensely from using grenades without having to change to them, to health regeneration and "two weapon" only action. Not to mention every shooter that comes out now seems compelled to have at least one or more of those conventions applied.
I dunno, it just feels right.
Maybe im crazy.