Games you loved that haven't aged well?

[HylianYoshi]

Kill Butt 3 was a classic, but I feel it hasn't aged too well.

Actully, a lot of Mario Kart games haven't aged all that well. But I'm going with Mario Kart 64, because going back to it, its controls are extremely clunky for today's standards, even if it was my first racing game. I still note problems with it. Another game would be Smash 64 (my first fighting game). I prefered it to Brawl a few years ago when I played that, but again, the game feel is clunky for today's standards and I would rather just play Smash Wii U.