I liked the visuals, and soundtrack for Tron Legacy, but I always hated how the world didn't seem like a computer world anymore. It just seemed like some seedy real world, especially when you have the club scene. That didn't feel like a location that would have existed in original Tron. It's a different grid, and it was meant to be a free system, so I get that things might be different, but it didn't feel like a world inhabited by programs. Just shitty real people with glowy clothes.
I think whenever I think of Tron Legacy, the only thing I think of now is how smoking hot Olivia Wilde is in it. Otherwise, it is forgettable.