I really don't see what was so great about it, to be honest. Maybe it would have been a lot more fun had I played it when I was younger - but it really wasn't as great as I thought it would be. (It was also the only Halo game I hadn't played yet.)
Magnum and shotgun were awesome to use, but hot damn - those vehicles were a pain in the ass to even bother with.
Not to mention that sometimes when some sneaky little camo Elite -blam!-gle with a sword pops out of nowhere and slices my spine, it would sometimes take me as far back as 5-8 minutes from that particular point because the checkpoints don't always register.
Scorpion projectile splash damage was pretty much -blam!- nonexistent, the repetitive area design with levels really became a bore and really fleshed out how long and tiring some of the levels were, etc.
What did you think about Halo: CE?