From American Way:
“[…] The prospect of returning to the pop culture juggernaut was exciting for Hamill, but not without its concerns, born largely of fans’ responses to the much-maligned 1999-to-2005 prequel trilogy set ahead of Skywalker’s birth.
“On one hand, I liked the idea because, when I look back, I never had so much fun making movies. Ever,” he says. “But part of me was very terrified. There was a beginning, a middle and an end. Why go back and take the chance of ruining—or at least tarnishing—people’s memories of it? Fans can be just brutal. Some of the things they said about the prequels were just so over the top. I can see it’s not your favorite movie, but it ruined your childhood? Come on. Let’s put it in perspective.” […]”
Mark Hamill played Luke Skywalker in Episodes IV through VIII.