One of the special features on the "Looney Tunes Golden Collection: Volume 1 Disc 1" DVD, "Behind the Tunes: Short Fuse Shootout: The Small Tale of Yosemite Sam" tells how the roughest, toughest he-man stuffest hombre as ever crossed the Rio Grande came to be. Prior to this, I had never totally understood the major difference between Yosemite Sam and Elmer Fudd: Sam was aggressive and angry, while Elmer was a total sap.
So, it's mostly like any other special feature on a DVD. For me personally, it's always neat to see interviews with the aging cartoonists, namely Friz Freleng (who died twelve years ago today). You might want to check it out, varmint.