I would not want any of the current methods. I would want a bunch of methadone and morphine and that laughing gas that the dentist knocks you out with, and then to large caliber rifles to be pointed perpendicular to one another at my head and fired after I'd reached the point where the drugs had started to cause brain damage and I was unconscious.
edit: Hell, add another rifle round through the heart.
edit: Hell, add another rifle round through the heart.