I voted depends on the ride.
I will never get over GMR being rethemed.
At Epcot, I loved the ride that had the cop hiding behind the billboard and the early man blowing on his feet, I can't remember the name of it but they closed it years ago. I miss it.
Don't even get me started on Frozen, didn't like the movie and don't like the ride. Loved Maelstrom though.
Old Figment beats new Figment hands down but I'll take Figment any way I can get that little purple fella.
Like the old Test Track better than the new one but I do ride the new one.
Sea base getting rethemed to Nemo broke my heart. I like the movie well enough but you don't get to see the real fish that much in the new ride. I skip it most of the time and just walk in through the gift shop and spend my time viewing the fish (I'm a scuba diver so that might have something to do with it, and yes, I have been diving there twice).
I loved Listening to the Land better than Living with it. There was something about real people driving the boats that seemed better. I do ride it still and still love it, especially if you are lucky enough to do it at night.
I liked the old Soarin better than the new but that is mostly because unless you smack dab in the middle, the screen is off scew.
I miss the Backlot Tour at the old MGM Studios, you really got to see a lot. I was o.k. with the new one but hated that the entire thing got closed down. Speaking of that area, I loved the Streets of America, I would get there early in the morning, grab a cup of coffee and sit on a bench and just enjoy looking in the windows. I guess I just miss the old theming of MGM as opposed to the new Hollywood Studios. I like Galazy's Edge well enough and Toy Story Land is good but I loved the working studio aspect.