Probably someone said this earlier (TL:DR) but im gonna say, originality is what makes old game the best.

Also at the time we have nothing to put as a benchmark, so our options are always open to new games and with that we find newer and fresher gameplay of different games with different genres.

Now it seems we do have a benchmark, and when the game does not deliver the same trill as what their predecessor, we tend to be disappointed.