Everyone knows of Snapes longing for the D.A.D.A. job at Hogworts. Why do you think Snape would want to teach Defense against the Dark Arts knowing that every teacher before him lasted no more than one year? Please explain why you feel Snape would want the D.A.D.A. job and why he wanted it even though teaching it may mean that it would be the last thing he does at Hogworts.