Halo CE is overrated to me. I understand that it revolutionized the FPS genre, but as far as Halo games go, to me it doesn't stand up to 2 or 3. Not saying CE was bad, of course not. But I look at how much Halo 2 and 3 improved on the formula began in CE, I can't help but wonder why some people call CE the best Halo game.
I couldn't agree more. It no doubt made a huge impact on everybody, however it has nothing on newer Halo titles which have much better replayability.
So I would have to say Halo CE is probably the most overrated in the series. I think Reach is probably the most underrated of them all, if all the online hate it anything to go by. That may be because of my bias toward Reach though hah.