For me personally, it depends on the film. For a new hope, the original gout or despecialized editions are best. It shows the original Star Wars film how it was originally intended to be. For empire, I prefer the blue ray 2011 release. I think most of the changes and edits that have been made to empire were mostly understandable and didn’t really change the film too much, so in this case, I watch empire in whichever edit has the best resolution. For return of the Jedi, I usually watch the original gout or despecialized. I wasn’t a fan of the edits that came with the re-releases (retarded sarlaac, darth Vaders “noo”) so for rotj, I take the same approach as a new hope.