Berbatov endured a mixed first two seasons at Old Trafford and was generally considered a flop by United's supporters but his form this season has led to a change in attitude towards the £30.75million signing.
Seven goals already this season have sent him soaring to the top of the Premier League scoring charts and his match-winning hat-trick against Liverpool last weekend was the first by a United player in the fixture since 1946.
For Berbatov, it could go down as the day he was finally freed from his shackles.
"I suppose I am a strange guy but I am shy and maybe some people don't realise that," he said in an interview with MUTV.
"I have a difficulty letting someone else into my inner circle.
"I tried not to think about it (the fee) but sometimes you just can't help it.
"You start thinking, 'That's a lot of money, what is going to happen if I don't prove good enough or I don't score enough goals?'.
"It was always going through my mind and sometimes it can be bad for your concentration and your skills because it distracts you from the main goal.
"In the end I just have to relax and play. I am playing for the biggest club in the world and that's it - nobody can say anything else."
Berbatov has always been viewed as being a little different and that is summed up by the moment that gave him most pleasure two seasons ago - a superb pivot past James Collins to set up Cristiano Ronaldo's tap-in against West Ham.
"I watched it at home and rewound it in my head," he revealed.
"I was the luckiest guy in the world doing that. It gave me pleasure."
That is just Berbatov's take on the game.
"I am a striker. People expect me to score many goals," he said.
"But sometimes the difficult pass, the pass no-one else can see, when you make it happen, it is more important than scoring the goal.
"It gives you a bigger feeling.
"I have always like to play with the ball.
"You have some strikers who wait for one chance in the whole of the game. I am not like this. Obviously there are games when you stand around doing nothing all game and in the end, the ball hits your knee and goes in the net.
"But that doesn't make me feel happy. I need to feel the ball at my feet.
"I need to organise things and make things happen. That is what makes me feel like a player.
"There is a difference between a football player and a goalscorer. For me it is the whole package."