I like to call this one "The First Actually Polished Mega Man Game". The level design doesn't fall off a cliff at any point, and that's despite introducing a 2nd castle for more levels. All of the robot master weapons are actually usable even though some are clearly better than others. It has an actually good pause menu that would set the standard for the rest of the series. The list goes on, but despite my praise, I wouldn't say it's one of my favorites in the classic series for some reason. I just can't put my finger on the reason why that is.