Generic? Well, I can't say. If you find the idea of power armoured super soldiers fighting aliens with brightly coloured lasers, then yes, it's a little generic, but remember that Chief isn't here. Your entire team have faces, voices, personalities...
You may like it Brandon. Story isn't fantastic, but it works, there's plenty of throw backs to Halo 1 in the level design, the enemies seem a lot smarter, (flanking you more aggressively, even hopping rooves, always trying to shake your aim off them, retreating when their shields clunk out) there's a few new guns, all of them have been redesigned, all of the weapons effects have been redesigned (explosions, the aforementioned new dropships and the old style Hunters) the graphics in general are far better.
The entire package just shines from time spent polishing. It's easily the best Halo game, no contest. I can't think of a better way for the series to end.
Oh, and take my advice. Play on Heroic.