Final Fantasy, FFIV, FFVI, and Tactics have all aged well. I still play them to this day. Heroes of Might and Magic 3 is still mighty. Super C is still great. Castlevania: SOTN is awesome. Pretty much anything sprite based still holds some anti-aging ability. I find that most 3D games really show their age, even if they have great game mechanics. If I play them on a non-HD TV, they work much better.