The Swansea City midfielder is the Swans top scorer and a leading candidate for player of the year in his first season at the Liberty Stadium.
And he shakes off criticism that he has not performed at that level telling the Evening Post "I've heard people say I didn't do it in the Premier League with Wigan. That's not fair because I didn't really play at Wigan," he said.
"I couldn't get any confidence and sharpness from coming on for five or ten minutes. There is a massive pressure for you to perform in such a small period.
"When you're not playing much, people forget where you are and that's worrying.
"I could have gone to one or two teams in the Premier League, but I had to look at the bigger picture
"If I'd gone to one of those clubs I would probably have been in and out of the side, but I needed to be in a team every week.
"Making the move has paid off so far. I have scored the goals I wanted to score — more than I thought, actually. It's great being nominated for awards and that's recognition for the club as well as myself.
"This season I've had call-ups for England Under-21s, which I didn't have before I came here, so that just shows that I've made the right move.
"Everyone has helped me so much this season — the manager, coaches, players and the physios.
"I'm full of confidence now, which I wasn't last season. I've enjoyed myself and it has been a good season so far, but it would be even better if we got promoted. I won't be happy until then.
"Making my debut seems quite a while ago now," reflected Sinclair. "So much has happened since then, but I'm delighted to be part of a successful side that has also given me a platform to express myself.
"When I get back there (the Premier League) I will be more confident because of the chance Swansea and the gaffer have given me.
"We are getting close to what we want to achieve — we are strong enough and have plenty of quality. We have to concentrate on ourselves and not worry about everyone else.
"If we win promotion, I'd be a very happy guy."