The 29-year-old Dutch striker says he has put all the disappointment in his career behind him and also revealed the decision behind his new shirt number at Old Trafford
The former Arsenal man announced that he would not be extending his contract with the Gunners in July, and following a battle for his signature with fierce rivals Manchester City, the Old Trafford club finally secured his signature in August.
And despite having the option to join the Premier League champions, Van Persie says he chose United for a number of reasons, and that they are the perfect club for him.
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"United breathes football — in every aspect. It’s a great club. That’s why I made my decision to come here quite quickly.
"[The decision to join United] was based on a lot of things — Man Utd players, the stadium and the manager. I think everyone knows me by now. From that perspective I am quite principled. It's always difficult to find a perfect match but I think this club is just perfect for me."
Van Persie also revealed his decision to take the No.20 shirt at Old Trafford, saying he chose it because he is hoping to lead the side to a record 20th league title.
"Well, I had the option of 20 or 21 and the reason I took this shirt is because we’re all here to be champions this year and that would mean a 20th league title for United," he added.
"I would certainly like to be part of that, they have [had an era of dominance] already and I'd like to help them do it again."
The Dutch striker is hoping to move on from past disappointments including spells on the sidelines through injury, and even his missed penalty against Southampton earlier this season - something he still struggles to explain.
"A career won’t be always a bed of roses. You have disappointment," he added.
"Look at my missed penalty kick against Southampton recently. That is what you call a disappointment. Taking a penalty kick in that way when you are 2-1 behind — that’s just bad and I couldn't explain it, not even to myself.
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"But it’s about how you react. What you do next? Do you stay disappointed? Or are you going to hunt, and get over it? In the game I put it behind me, thankfully and went on to score a hat-trick.
"Many people can get swept away after something like that. It's happened to me before - and it's all over then. Someone who is 18 years old wouldn't score two times after it. I wouldn't have done a couple of years ago."
The Dutch striker also paid respect to former club Arsenal, admitting that he owes them a lot, and training with the likes of Dennis Bergkamp as a youngster helped to mould him.
He continued: "Arsenal is an unbelievable club. The way I am today, the player I am today, is because of them; the way they raised me.
"I could have gone to PSV Eindhoven when I was at Feyenoord and I could have gone to Sevilla — and I could have earned a bit more money at Sevilla. But at Arsenal I was training with Dennis Bergkamp, Patrick Vieira, Thierry Henry at the age of just 20. I owe the club a lot."