I've just now really come to grips with this. I try to avoid games that I've played and beaten, specially games that have little or no replay value. But I've been living through Teenage Mutant Ninja Turtles in Time, Megaman 1-6, Megaman X-6, Final Fantasy 4, Crystalis and more.

I've recently started playing through the flash equivalents of the old NES games, as well. I don't think it's cool to link to the site, seeing I'm not up to speed on the legality issues. Either way, what games from your childhood deserve a second visit?

Teenage Mutant Ninja Turtles in Time
Megaman 1-6
Megaman X-6
Final Fantasy 4
Crystalis
Godzilla: King of Monsters
A Boy and his Blob
Metal Gear
CastleVania
DuckTales
Donkey Kong Country
Splatterhouse 1-3
Metal Combat 1&2
Mystic Quest


-Sin