Final fantasy 7 is not overated, it is one of the greatest games of all time, none of the other FFs have given me the same feeling after playing it. Aeris death was and still is one of the most emotional moments I have had playing.
Soundtrack is one of the best there is, graphics where great at the time, the inclusion of the cinematics which made you get more emotionaly connected to the characters and story, the characters where great, far more developed than the usual RPG charactewrs( the warrior, the mage, the princess, etc...), villians developed to the the point whre u actually care about them.
Each character was deeply developed, the setting for the story was great( Not like the kingdom or things that had been done so many times before).
Things like the lifestream, the extraction of mako energy, the people at the slums in midgar, made you feel it has to do with the bad treatment we give to the planet, and how are poor people affected by it and corporations gain more power than goverments(Shinra).
All of this, and the fact that there are guys with giant swords that can fight with others with guns, ninjas, sexy girls, badass badguys, an lion that speaks and a guy with a gattlin gun in his arm make this game awesome.