personally i think ms 1, x and 3 are the best. biggest gripe of the ms games ive got is that at the hardest level the bosses dont get harder in patterns, or in the amount of firepower they use. instead they need to get shot for what seems like an hour to kill just 1. even those damn trains in 2 and x, shooting them on the hardest difficulty took a long ass time. something im still not too fond of. maybe with a new engine they could just have you attacked by more enemies and have more bullets on screen instead of having bosses and such take forever to kill. this is something i also cant stand in games like god of war 3, the game doesnt get harder on the hardest difficulty, its just that all the enemies take forever to die and your moves and weapons dont seem that strong anymore.