MG
Full Member
The reason Harry doesn't keep the Elder Wand is explained a bit more clearly in the book. Basically throughout history the Elder Wand has attracted huge amounts of violence and murder. The wand usually changes hands because of another person killing the former master, or at least duelling them and incapacitating them. It's a highly dangerous thing to own because if people know you have it you suddenly become at huge risk of attack - it brings trouble, quite basically, and Harry feels that he's had enough trouble in his life and just wants a quiet, normal life from now on, which is fair enough when you consider everything he's been through in the book since he was a baby.