Meh, I honestly couldn't care less about most of that, call me ignorant and whatnot.
I just play games like Halo and COD for fun. And I mean, the minute I saw a green super soldier pwning it up with dispensable Marines in the original Halo, I lost all intention of seeing the series play out as an artform and started enjoying the games for what I thought they were: big vehicles, mean guns, and cannon-fodder aliens in the middle of a secondary struggle for the survival of humanity. Experienced through some walking suit of armour.
Don't get me wrong, I immerse myself in the story when I play the games, but I always play them with a 'Take it easy,' attitude. It's always great to have the game wrapped up in a good yarn and have my mouth drop to the floor every now and again because something insane's happened onscreen. But at the end of the day, I don't expect an amazing narrative or gameplay that actually puts me into 'TACTICAL MODE: HOT' when I play a Halo game. Much less, any series that's most famous for a bloke running around in a green suit of armour with a gun, single-handedly saving humanity.

As for self-playing battles, I didn't find that to be too true with these walking suits made of bullet-magnet that the story calls 'Noble Team'.

Sure, you can take care of most firefights by flanking left, leaving Noble to be your base of fire whilst you assault the hostiles (I'm not sure why they're referred to as Tangoes by the friendlies... meh), but as long as Covenant are dying and I'm doing the shooting, I don't really mind this in a Halo game.
I used to hate Halo some time ago because it wasn't really sophisticated in terms of its storyline the same way as RPGs were (in-game for the most part), and the combat wasn't tactical in the same way Ghost Recon was. But now I view Halo as really something akin to a party game. On Fridays about a dozen or so of us will turn our xboxes on and throw a Halo game into our disc drives, form a party, and play a few custom games whilst yelling and screaming over the mikes and making asses out of ourselves whilst having a good laugh. And that's what Halo is to me.
As opposed to games like Mass Effect that I play almost purely for their storyline and associated elements.