I’ll dissent somewhat and say that if I had to choose, I would go with the 2004/2011 versions (for all except Jedi). Why?

Han and Greedo shoot at pretty much the same time, blink and you’ll miss Greedo shooting at all and you no longer have to see that TERRIBLE head dodge effect.
CG Jabba was terrible in 97.
New Emperor is an improvement.
Luke scream was present in 97.

Jedi though I’d have to take 97 because the most noticeable changes–Hayden ghost and Vader NOOOO–are so terrible. Oh and Jar Jar in the victory celebration sequence. But then, Jedi is the most ruined one in any of them because of “Jedi Rocks” alone anyway. And I don’t care for the new ending/song either, with or without Jar Jar.