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The 32-year-old spent four years at St James' Park before moving to west London, admitting he was 'settled' during his time at the Magpies.
And Barton says he still looks out for Newcastle's results and was disappointed by the manner of his Tyneside exit.
“The way it ended for me was disappointing because I was really enjoying living in the city and enjoying playing football," the QPR midfielder told the Newcastle Evening Chronicle.
“I felt I was settled for the first time in a long time. Then it all changed again.
“It is one of the first results I look for straight after whoever it I have been playing for. I see how Everton are getting on because there my boyhood club, then straight away Newcastle.”
Barton was speaking ahead of QPR's visit to Newcastle tomorrow afternoon, a clash which Harry Redknapp's side have been preparing for intensely during training.
Several training photos were released this afternoon, with Shaun Wright-Phillips one of the prominent figures involved: