In addition to rand al'thor's answer, one anecdote about Alec Guinness which I find funny, and which illustrates his well-known dislike for Star Wars is this one:
A kid approached him, asking for his autograph and claiming to have seen Star Wars "a hundred times". Alec Guinness gave the autograph on the condition the kid promised him never to watch it again.
A refurbished Star Wars is on somewhere or everywhere. I have no intention of revisiting any galaxy. I shrivel inside each time it is mentioned. Twenty years ago, when the film was first shown, it had a freshness, also a sense of moral good and fun. Then I began to be uneasy at the influence it might be having. The bad penny first dropped in San Francisco when a sweet-faced boy of twelve told me proudly that he had seen Star Wars over a hundred times. His elegant mother nodded with approval. Looking into the boy’s eyes I thought I detected little star-shells of madness beginning to form and I guessed that one day they would explode.
“I would love you to do something for me,” I said.
“Anything! Anything!” the boy said rapturously.
“You won’t like what I’m going to ask you to do,” I said.
“Anything, sir, anything!”
“Well,” I said, “do you think you could promise never to see Star Wars again?”
He burst into tears. His mother drew himself up to an immense height. “What a dreadful thing to say to a child!” she barked, and dragged the poor kid away. Maybe she was right but I just hope the lad, now in his thirties, is not living in a fantasy world of secondhand, childish banalities.
I knew this anecdote from a newspaper article, but Wikipedia gives the source as the book "A Positively Final Appearance" (additional source).