I strongly believe that if you can survive for seven years in Italian football, you can make it anywhere else.
For me to be in a Champions League final playing for Milan was already the best experience you can imagine.
People say that Chelsea are undergoing a revolution. Well, that suits me fine, because I am a true revolutionary.
I went to Italy as a 21-year-old when I could easily have stayed in Argentina, playing for the biggest club in the land, River Plate, and having a nice, comfortable life.
I grew without having a thing about the Ballon d'Or. When I was young, Ballon d'Or was also given to the European players. I didn't grow with this ambition. I think it's a personal trophy and football is a team game.
When I played, it was more difficult to score goals in Italy than anywhere else.
I cried after the game when we won the league - it was hugely special to me. The first season we came second and got to the Champions League semifinal, and I knew I needed to come back and win with Chelsea.
It is our desire to win the World Cup again but it is going to be difficult and we mustn't forget that in the history of football, Argentina has only won the World Cup twice. That shows how difficult it will be to win it.