Speaking to the Northampton Chronicle, the 27-year-old actor played down the villainy of his character Danny.
Bergin said: "I would get booed in the supermarket but, because he did everything with a smile, he had that energy about him that he was not really like that.
"People would boo me, although it wasn't aggressive. It was in a panto spirit."
Bergin was cast in November 2009 under former executive producer Diederick Santer, before being written out six months later by Santer's successor Bryan Kirkwood.
Danny 'Mitchell' pretended to be the son of the evil Archie (Larry Lamb) to con Roxy (Rita Simons).
Bergin has, since leaving Albert Square, outlined his desire to return to the BBC soap.