McTomin has four goals and two assists in 15 games for Antonio Conte and has become a firm favorite with the supporters.
His arrival at Napoli coincided with international midfield colleague Billy Gilmour.
“I love this place,” added McTominay. “I love the fans, I love my team-mates. It’s been a pleasure to be with Billy every day rather than watching him in Scotland and we’ve helped each other a lot.”
Manchester United’s decision to allow McTominay to leave has surprised some pundits and former Old Trafford players.
Then manager Erik ten Haag stated his desire to keep the midfielder, but Financial Fair Play rules played a role, with the sale of homegrown players considered pure profit.
“It was a mutual decision,” McTominay, who joined United in 2002, said. “It was a case of – there’s an opportunity, do you want to go?
“Obviously I know from their side FFP is tough. It’s not easy for clubs to make decisions about homegrown players, but that was never in my thought process.
“My thought process came here, seeing the fans, seeing the coach and hopefully doing really good things.”
Having been with United since the age of five, it was an emotional farewell.
“On my last day, I had to go and see everyone and it wasn’t easy to say goodbye,” he said. “But that’s football, that’s life.
“I talked to him [Ten Hag]. He expressed his thoughts about the situation. I said, ‘Listen this is my career, I’m here to advance myself’.
“In this situation, I have to look at number one and go with my gut feeling about what I want to do with my career and not be held back by any other external factors.
“It was friendly. I love that football club to bits, they were my life for 22 years, but I’ve moved on now. I’m thoroughly enjoying myself here.”
