Probably the worst example being Cinema Paradiso. The original cut had nostalgia with a mixture of regret and acceptance of what is past. Then, the new cut concludes with the disappointment of trying to confront past missed opportunities. Whether it's meant to be hyperrealistic, I also liked the original movie, which was a different movie, but can't be found anymore.
I think the same goes for the earlier releases of Star Wars. I know that the special effects of the era weren't "better", but the modern CGI makes them different movies, and I'd like to have the original version available, too.