for me many old games are just that, old. some have still great modern gameplay and just as good music as back then. if the artstyle is nice then i play them and dont think they are ugly.
some games i really think are fucking ugly like the when the textures are verw low blurry and low resolution.
and these 2d games or games with sprites (how to call them? like age of empires 1 or 2. for me they dont age, its their artstyle and if you make it 3d then its not nive anymore.
what game i cant play are these, that are 3d but something makes it that the picture is all so flat and confusing. metal gear solid 3, as an example.
great result!