Good god, it seems like 20% of the people here liked Halo.
Well, I really *really* am starting to like Halo, a lot. After waiting for the damn thing to come out for PC and abstaining from buying an Xbox for it (one console that I seldom use is plenty, thank you) I am very impressed with the gameplay.
It took me most of the way through the game to really appreciate it, though. At first I was a little underwhelmed like many people are here. I guess I was expecting the game to make my monitor explode or make me soil my trousers or something, but you really can see how well designed the AI is and how nicely the weapons are balanced after playing the game for awhile.
There are so many strategies to playing that game it's incredible. First of all, the two weapon limit is brilliant. This has to be the only (if not one of the only) fps that limits you so severly in primary weapons. However you can still carry a ton of grenades (8) that will save your life time and time again. And please don't chime in that 2 weapons makes the game crap. If you figure out how two guns gan be used
together effectively, it makes it all worthwhile. 2 guns is plenty when every guy you kill drops a gun that you can use (but again, it's balanced because most guys carry that crappy charge-up plasma gun. You have to pick and choose the good stuff - Plasma Rifle, etc from the mediocre guns).
What I really like is the variety of ways to play the game. Butting weaker Covenant guys with your gun will kill them instantly (especially when they're distracted or sleeping), and will stun stronger ones. More powerful Covenant guys with shields seem unphased by bullets until their shields are gone, but then bullets really hurt them. However, if you pump a powerful fully-shielded Covenant full of Plasma, each shot keeps him in place (their shields are essentially the same Plasma, after all).
True, the enemy AI isn't going to discover a new element for the periodic table anytime soon, or write a dissertation on 14th century french literature, but it's smart enough to really put the hurt on you once the number of foes you fight picks up. But despite the fact that enemies come in HUGE numbers in higher difficulties, it's not the *endless* ranks of guys that many games throw at you. There's always a finite number of enemies in Halo (except with those messed up "Flood" guys in the last level, which you need to keep coming you they can give you grenades

).
Minutae in Halo is what really makes it great - it's a true sum of it's (well-designed) parts. That and the vehicles. There ought to be a mode to fly a Banshee in every level just for kicks, it's that good. Not to mention all of the other vehicles are utter bliss to drive.
Those who don't like Halo - have you played up to the level with the tank? I found that to be one of the most fun FPS experiences I've ever had. Right up there with like 80% of the levels in Goldeneye (which were all incredible).