The on-loan Real Madrid forward said: "It is not an issue of counting to 10, 100 or 1,000. This is my personality. I would have to file down certain aspects of it, but I cannot change overnight.
"If I make a mistake, then I make a mistake. That is all. Why should I apologise and to who? Recognising my errors does not mean saying sorry.
"The media are always happy with me, to begin with. Then when they discover what I'm like they start to attack me," he told Sky Italia television.
"I don't really care, though. I am always treated with extremes, they build me up and knock me down in an instant. I play well for one game and am back to being a genius, if I get one match wrong I am the crazy guy who doesn't want to train. There is never grey with me, it is either black or white."
He added: "It is great to be back in Italy and I got such a warm welcome from the Sampdoria fans. There were so many people, I found it quite moving.
"My mother is extremely happy to be in Italy. Making her and the people close to me - especially my cousins - content is very important. If they aren't happy, then I can't be either."