Ironic Pirate said:
That doesn't make it better though. It might mean the game has a better marketing team, but beyond a certain basic level sales aren't necessarily indicative of quality.
Not necessarily no, but my point is that there are quantitative ways to compare things like this, and if you examined enough of them you could make some claims that are pretty close. to definitive. Obviously it would be complicated to be 100% sure, but consider this extreme: is the classic Atari Game ET worse than Classic Nintendo Game Super Mario Brothers? When you combine the weight of sales, longevity, sequels, public opinion consensus, etc you get a pretty clear picture that one is better than the other.
Now, I'm not saying people can have 'wrong opinions', obviously an opinion in and of itself is rather untouchable. But that doesn't mean we have no means to evaluate the question quantitatively.