After starting out as a striker and a winger, Sir Alex Ferguson converted him into a defensive midfielder where he carried on at the Magpies.
Smith said, “Leaving Leeds to go to Man United caused a hoo-ha but I hope I got respect from the people I worked with and who managed me.
“I would like to think Leeds could be proud of me going from Leeds to Manchester United because there is not many kids coming through the system from 10 years old who get to sign for one of the biggest clubs in the world.
“But it was a shame that people at the club who brought me through never got much credit for it because it had to be a bit hush-hush and people felt they had to hide it under a bush.
“I loved it at Manchester United though, it was intense and I saw it as a great opportunity to learn from some of the best of the players.
“I was probably a bit of annoyance to them because I wanted to learn and put myself against them in training.
“I remember my first pre-season I would sit and talk to the best players, like Roy Keane.
“The people and players there, when they had won something they would be so focused on trying to win again. That separated them and why they were the best because they were obsessed with winning."