Why would I? The Halo story doesn't appeal to me in the slightest, the only thing that does (even remotely) of it are the ships.
But what you're saying is, Halo tries to be a teambased, somewhat skillbased, run-and-gun shooter in third and first person at the same time, with a knife button, context-sensitive cover, customizable weapons, curb-stomping, with a levelling system (And prestige mode), unlockable weapons, set in several real-world derived areas with aliens that live under the surface, on a ring that is purely fictional, with a super-trooper protagonist and his digital sidekick, fighting aliens from another galaxy using killstreak-awarded powerups like radar and artillery?
Lots of games use similar mechanics, that doesn't mean they're bridges between games...