"At the end of it, I didn't like having cameras around the house all the time," he told reporters at the MTV Music Awards in Rome. "When you watch a 25-minute episode, I've been filming all day."
His wife Sharon Osbourne, currently judging on ITV1's 'X-Factor', said: "Now everybody's doing reality shows. He's done it, he's been there, he's got to do something else."
The Osbournes are believed to have earned around £46m from the three series of the show.
The Osbourne family are not the only ones to get bored as viewers have started to abandon the show.
Last year's third-season premiere on US MTV saw viewer numbers down by almost 50% with just 3.4m tuning into watch the F-word-loving Ozzy, daughter Kelly, son Jack and wife Sharon.
In November 2002, the show's second-season pulled in 6.6m, showing the law of diminishing returns was doing its thing.
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