Normally they do things that can irk you but there is a lot there to like. I dislike the idea of Tower of Terror closing at Disneyland for Guardians of the Galaxy but does it mean I refuse to return? No. Closing Pirates, Haunted Mansion or Small World would bother me a lot because they are all Walt's late additions before he died (correct me if I am wrong but he at least had a rough draft of Haunted Mansion before he died).
Or Carousel of Progress, or Tiki Birds. Stuff like that is important to keep because Walt Disney himself created this. Country Bear Jamboree was a pretty rough draft at the time of his death but that show is dripping with Disney charm. A cast member who was introducing the Carousel of Progress brought a very good point up. She said it is the only ride in WDW that Walt Disney rode. True, I guess when you think of it, it's the same stage. So this stuff is important to me.
For me certain things like selling the name. If the company was sold and it became Pepsi World or something it would lose its charm forever. It is the old-school Disney charm that makes the park what it is, and a new company is going to break away from that. So, I guess that would be it.