Its funny this discussion is only possible for a game with D&D rule set. In other RPGs there is only one wizzard class. In Dragon Age they even merged wizzard and preist. But it is not possible to have a dungeon master in a video game so the voice is fair engough. Since BG2 my main char is always a human sorcerer

but the pathfinder rule set offers some very interseting wizzard subclasses!