Lol, that_guy, what imagination question? Clarify.
Halo stands as a single player experience just fine. The first game was an almost purely SP experience, it didn't even have online implementation and contained a fairly limited number of MP maps as opposed to a 12 hour plus campaign.
Your interpretation of the game as boring is highly subjective - just take a look at the sales of the game and critical reception for proof of that. Your opinions are not the be-all-end-all I'm afraid.
My reasons for suspecting you haven't played the game lie in blatantly false statements such as that Halo: Combat Evolved's missions (known for being some of the longest, most expansive in any first person shooter) take "30 minutes" at most to complete, your comparing of the Halo art style to Riddick when they have absolutely nothing in common, and your general lack of knowledge of the games. I can see through your posts pretty easily, so you might want to start trying harder.
And Thejew, Halo doesn't have a slo-mo gameplay feature. Please actually play these games before you claim to have played them. Otherwise you make yourself look like a ten year old drooling fanboy.
I have played them you fucker, you mentioned "slow movement speed" which was what I was addressing. My friend Alex and I used to play Halo 3 on live all the time. I loved that pink looking gun that shot crystals everywhere, and my friend loved using that huge hammer thing and we both were quite good with the sword. Been a while since I've played it (about a year though).