You can't really complain about this thread being simplistic or low content. A lot of people seem to rag on Halo as if the majority of people think it is a bad game. TC has simplified the question and presented it without any outlying factors or a middle ground.
Do you like Halo?
I hate it when people over-analyze the shit out of a game in an attempt to make it not fun. Each Halo game has it's own strengths and weaknesses.
Halo 1 had a great campaign (design and plot-wise). Halo 2 introduced a very stable and well designed multiplayer. Halo 3 made that multiplayer experience much cooler with TONS of features. Halo Wars was a reasonably well polished take on console RTS. ODST was a semi-cool artsy take on Halo bogged down by lame, poorly developed characters? I dunno... this one wasn't really too great... and Halo Reach was a pretty well made shooter in both campaign and multiplayer. Sure, the story doesn't really stand up to a lot of other games, but it could honestly be wayy worse.
But yeah, I think a "good" game is defined by the ratio of the amount of people who like it to the amount that do not, and I think this thread proves that Halo is a pretty damn good game.