Berbatov has failed to fully convince the United fans since his 2008 arrival from Tottenham but a hat-trick in Sunday's thrilling 3-2 victory over Liverpool took his tally to six goals in five Premier League appearances.
The 29-year-old says he feels privileged to be a United player and outlined the lengths he went to during the off-season to ensure he was in top condition for the 2010/11 campaign.
"I was disappointed with myself that I could not please all the supporters," said Berbatov.
"I've said before, the people of Manchester United are the judges and that is the way it should be. It's their team. I am a guest - a privileged guest.
"Now I feel like everything I imagine on the pitch will come true and that feels awesome.
"I have worked hard on my fitness. So hard. I'm not a weights guy, I'm sure you can see by my body. But I have been trying to even work on that.
"I ran six miles every day during the off season. I watched one World Cup match, went for a run, then watched another and went for another run. This was my routine."
He added: "This crowd at Old Trafford. The way I feel right now. I'm not tired, I feel alive.
"I have always said I am so lucky to play here. For these people. For this manager. For this club. With these players."