Super Mario Galaxy 1 and 2. The sense of wonder and imagination in those games is simply unparalleled. I wish there were more 3D platformers these days.
Tales of Symphonia, Tales of the Abyss, Wind Waker, FF:CC, Goemon's Great Adventure, pretty much every Pokemon game but Sapphire version in particular. Basically any game I played as a child that left a strong impression on me.
Super Mario Galaxy 1 and 2. The sense of wonder and imagination in those games are simply unparalleled. I wish there were more 3D platformers these days.
I would have to say Wind Waker for sure. The first time playing that in 2004-ish on my Gamecube was a magical experience. It gave me a sense of adventure like no other game. To this day I have never felt as much excitement and love inside of one game, such as Wind Waker. I just want to re-experience the feeling again!
I'd love to play the first Animal Crossing game again. That game was magical. I spent twelve hours on that game the very first day I played it. A friend brought it on an overnight stay, he went to bed early and I stayed up from 7 to 7. I ended up upgrading all the way to Nook's final expansion that night and I almost upgraded my house the entire way.
Ocarina of Time. I honestly wish I could play through it blind again, and experience my reactions to everything again, 'cause there's sooo much that happens in the game. Too bad I really don't remember anything about my first playthrough except not playing anymore when I reached the Water Temple.. xD
Wind Waker. It's one of the only games I can continue to play and never get tired of, but I'd love to go back and be able to play it for the first time again. The fact that you could sail made me so excited as a kid my first time through.
I don't mind replaying Ace Attorney. I don't think knowing the story really ruins the game. It's nice going through the second and third cases which I tend to forget. This is coming from an Ace Attorney nut mind you. I'd love to able to forget the Zero Escape series, especially 999 and replay them. Those are games that once you know the plot and especially the revelation of the mystery it's truly hard to enjoy multiple playthroughs.