tinyE: I'd have to go with almost everything from the NES minus a few really exceptional titles like Metroid and Contra. I was sitting there playing Ninja Gaiden on a rom the other day wondering how the hell I use to poor so many hours into it. :P
My brother had the Nintendo NES 8-bit system and I played several games on it, only a few stuck in my mind, mainly MegaMan and Mario Bros 3.
Those which didn't survive, well, are apparently those I don't remember.
JDelekto: I don't know if I have enough life in me to complete *all* the games on GOG that I haven't played before!
JinKazaragi: "All of them" would be a bit much especially since there are a lot of RPGs among them.
Yeah, that about clinches it. RPG's are my favorite, if only I could retire and play games. :)
Shaide: I can't think of any game really that I originally liked and then later discovered I disliked. I mean, the closest would be Allan Wake...When I first started playing it I liked it, but when I got to the end I hated it(Mainly because of it's ending)
Try harder.... usually those games are the crappy re-makes trying to milk off of peoples' better memories of good games on older platforms. :)