The striker, who moved to Inter from rivals AC Milan before the start of the season, has claimed that he turned down a move to Juventus because he would have been treated as a soldier by manager Antonio Conte.
Cassano told Italian television programme Che Tempo Che Fa: "I refused three times to go [to Juventus], they just want soldiers, people who only go straight on their tracks.
"Sometimes I have to go to the right, to the left, where I feel like.
"Inter boss Andrea Stramaccioni really wanted me. What does he like about me? I don't know. I just hope he didn't make the biggest mistake of his life!"
Inter welcome Catania to the San Siro on Sunday.