Smith has been gradually transforming himself into a defensive midfielder and feels he has finally got to grips with the position at United.
"I've got absolutely no interest in going back up front," Smith told The Journal.
"Defensive midfielder is my position and I enjoy it, I really do. The season in the Championship has helped me a lot - I've developed new skills and I know a lot more about what is needed to play in that role in front of the back four.
"You need a lot of discipline as you can't just go dashing off after the ball, or push forward in search of a goal. It takes some sacrifice and spending the whole season there in the Championship has really helped me learn it properly.
"It's a difficult job, but it's also a very satisfying one. You restrict yourself for the team, but when the team keeps a clean sheet it feels great. I thoroughly enjoy it, just as much as I did playing up front."