The former Roma winger has sealed a return to Italy, joining the Rossoneri on a free transfer from Paris Saint-Germain.
During his previous stint in Serie A at the Stadio Olimpico between 2008 and 2011, Menez was branded a 'problem player' because of a number of off-field incidents but the 27-year-old insists that he has matured in the intervening years.
"Am I a bad boy? The 'fact' that I am a bad boy - excuse the term - is rubbish," the Frenchman told Gazzetta dello Sport.
"People have a false picture of me and I want to prove that I am a quiet person on and off the field.
"I'm not saying that I have always been a saint but I am now grown up; I feel different. In Rome, I was young, I went wrong two or three times and I realised I made mistakes.
"As for those who judge me badly as a footballer, I say that in the first two seasons at PSG I managed almost 20 goals and 30 assists.
"This could be my year. My objectives are to take us back to the Champions League and to win something in this shirt, and to return to the national team."
Menez also revealed that new Milan coach Filippo Inzaghi was the main reason behind his move to San Siro.
"He had a discussion with me that convinced me straight away," the attacker said. "He is why I chose Milan.
"I feel a great understanding with the coach. I cannot fail because he is providing so much for me and I would give anything for him.
"I already knew him as a player, of course. He had so much charisma and was very determined, just like now. He told me he had spoken of me on the phone with Carlo Ancelotti, Zlatan Ibrahimovic and Thiago Silva, asking what I was like on the field and as a person. I know they have said nice things about me so I have to thank them."