The X axis is unlabeled and unexplained, the methods used for selecting games is undisclosed with the exception of top 10 chart, and in general there isn't enough information given to do anything but guess what its trying to say. So in essence we are left to take it on good faith that the graph has meaning.
But beyond all of that they are review scores and as I pointed out review scores are worthless unless you have the exact same tastes as the reviewers....considering metacritic is a composite review score its pretty much guaranteed to that the scores aren't born out of your tastes.
I'm not trying to be mean here but there are flaws beyond just my disagreement with the review scores. The effort was well-intended I'm sure but the result isn't that great to be brutally honest. With some adjustments it probably can be made useful but that would just get passed the technical issues with the graphs and we would still be left with the subjective nature of the data.
Which is really the point. Lots of subjective data does not create objective data. It is still subjective and by that virtue alone the data isn't meaningful unless you share the views and tastes.








