Actually, that's not true. Bret really didn't have a "character" as a part of the Hart Foundation. Whenever Hart and Neidhart would cut promos, most of the time it was the Anvil who showed the charisma and carried the interviews. Bret would tell you that himself. Hart has said that was so scared to cut interviews at one point, that he started WEARING the famous sunglasses because he didn't want Vince and the fans to see that he was scared and couldn't cut promos.
The Hitman has and always will be my favorite wrestler, but one thing Bret DIDN'T have was charisma or a strong personality. He was dedicated to his craft, appreciated his fans to the max, always stuck to what he believed in, and was a consummate professional in the ring.