well, you either like halo, or you dont. But I think you can call it a fact that halo is the best sci-fi fps games. (and with sci-fi I mean spaceships etc, so not stull like halflife 2

)
the Halo series has so far earned a great name for itself, and ofcourse, that also creates a group of people thats strongly against it.
tell me, whats bad about halo? whats so good about it? well, imo, for one, the gameplay is great in halo 1 and 2, so i excpect it to be the same with 3. the replay value of the game is good too. the difficulty level is good, so is the AI. controlling vehicles is easy and fun, not to mention the Multiplayer is well balanced.
I havnt played Halo 3 yet, But I am fairly sure it'll b a good game, maybe better

But so far, all the games I've played made by Bungie were, well, 'finished' if you know what I mean. everything jsut fits together etc. and so far noone has given me a reason to think different

(feel free to try so tough ^^ )