Halo Reach < Its dark sad story of a impossible mission to this day has me wanting more.
Halo ODST < Another dark Halo game where feeling human really made this a scray war to be in.
Halo 3 < Master Chief at his best. Heroics and the Arbiters best game.
I really like when Halo goes serious and dark. Hoping Halo 6 or the rumored Genisis goes the Reach/ODST direction.