Balotelli left City to join AC Milan in January 2013 after being involved in a training ground altercation with manager Roberto Mancini.
It was one of several off-the-field incidents that the Italy international made headlines for during his two-and-a-half-year stint at the club.
However, despite admitting that the 24-year-old used to 'drive him nuts', Aguero claims to have retained an affinity for the eccentric striker.
In his autobiography Born to Rise: My Story, the Argentine writes: "I still miss Mario Balotelli being at City. Even though he used to drive us all nuts. We all knew Mario was a little crazy. The thing was, Mario was crazy when he wanted to be."
Balotelli has struggled to produce his best form since leaving the Sky Blues and has recently courted criticism after scoring just once in his first 10 outings for new club Liverpool.