His eight medals in Beijing have made Phelps the most successful athlete in Olympic history, with a career total of 14 gold medals.
Phelps beat Mark Spitz's 1972 record of seven gold medals at one Games by being part of the victorious 4x100m medley team in Beijing.
But despite admitting he was overwhelmed by the reaction to his success, he said the thing that gave him most pride was his improvement as a swimmer.
"Everything was accomplished that I wanted - eight best times, that's what I wanted," he said.
"When you put so much time into trying, it's about improving. I was able to improve over the last year so I was already successful - no matter what happened with medals, I was already successful.
"I think the biggest thing is that I was as prepared as I could have been. I was in the best shape of my life, everything went perfectly, as I planned, as I dreamt."
Bookmark with:
What are these?