I guess I take for granted that extended time spent in the game contributes more to the subjective value. Otherwise, why play? Of course there are a plethora of reasons to keep playing. But if we disregard that for now.

There are edge cases. E.g. a lovely small title that isn't replayable and barely three hours long. That one could bring the average up a bit, depending on the price. But I'm not asking for a universal rule, rather where the ratio starts to hurt subjectively for people.

Or well, I guess what I really wanted to know is how people compare the price of games to other recreational joys. Especially considering the timespan of the compared activities. Though maybe a bit poorly phrased. :)