This is my favorite 8-bit era RPG by far and possibly my favorite Dragon Quest game. Its class-change system has few classes but contains a deceptive amount of depth and replayability, and the game is streamlined enough for me to want to actually replay it (sideways glance at DQVII). Extra credit for expertly straddling the line between challenging and unfair: something few other games in the series got right in my opinion.