Done with Normal mode after about 7-8 hours -- probably the most disappointing game of the trilogy (though I tend to hold Halo 2 in higher regard than a lot of people). Hard to explain without spoilers, but a guess there's a few non-spoiler problems worth considering:
--Story takes a while to really get going, then wraps up fairly quick
--Abuse of certain motifs -- Halo theme pounds almost everytime you hop in a vehicle, one major setpiece battle that is cool the first time is twice repeated to somewhat lesser effect (I guess they couldn't think of anything else?)
--Music feels mostly cribbed from the first two games....nothing new that is memorable here (though to be fair I tend not to notice music unless I'm playing Legendary)
--The story just feels really abbreviated, seems less expansive and epic than the previous 2 games. In a lot of ways it feels like it ramps down when it should be ramping up.
--If Halo 2 ended too early, Halo 3 somewhat overstays its welcome (I guess that evens it out
)
--Cortana looks like some kind of cyber-dominatrix now....if they wanted us to take her and her relationship with Master Chief seriously, why did they slut her up so much? Fanservice at its most embarassing.
Spoilers below are nothing highly specific to the story (ending, plot points), but spoiler-y enough to freak out some people:
spoiler (click to show/hide)
--Fighting brutes not as fun as fighting Elites - Elites as enemies gone for good
--Covenant story-arc is concluded 3/4 of the way into the game in an unsatisfying way and then everything after that is fighting the Flood UGGGGGH
--We never got the Urban Earth War that Halo 2's marketing and ending seemed to promise....a little desert, a little jungle, then back to Halo :\ Earth levels are good, but story-wise they feel like filler material.
--Cortana "flashes" don't ever add up to much of anything, I have no idea what they were really attempting to do with that...the whole subplot with her and Gravemind is useless....but maybe I just missed something interesting or insightful
I'll hold off final judgment until I'm done with it on Legendary.....as a good gameplay experience can easily overcome all of this nonsense, and I'm hoping that's where they will really deliver. I'm just mildly annoyed that they didn't really kick it up for this game.