#1 Eaten by a dragon after being played with in it's mouth for a while (chewing OK).
#2 castrated slowly (use of a scalpel across the scrotum to cut free the testicles individually) then penis cut off at base slowly and before I can bleed out disemboweled horizontally just below the belly button maybe while being fucked in the ass.
#3 castrated slowly (use of a scalpel across the scrotum and the cut free individually) then penis cut off at base slowly meanwhile fucked in the ass until I slowly bleed out. (Also wouldn't mind being fed my penis and at least one of my testicles, the other one my executor / master / mistress can eat, unless he / she wants them all which is fine too as long as they are not wasted on this occasion.
#4 disemboweled horizontally while being fucked in the ass (maybe carefully gutted so I can live a little longer, maybe even climax.
#5 in a suspended hogtie my genitals are tied off, left for a little while and my prostate massaged. While climaxing have my sliced genitals with sharp shears then be gutted vertically from bladder to heart, let my guts splatter to the floor.
#6 in a suspended hogtie I am pleasured and close to climax I am gutted vertically from bladder to heart, let my guts splatter to the floor while I am cumming.
#7 Sawn in half horizontally just below the  button with giant buzzsaw, while being pleasured (the saw can gut me right in half as I cum).
#8 Pike impalment using gravity technique up ass. Lowered on to the pike just before a climax so the pike causes climax rubbing along the prostate (pike should also not be extremely sharp at point for maximum pleasure going in but longer impalement). I should also be spit roasted on the pole and eaten when done.
#9 Eaten by large cat (Tiger the best) with something protective on the neck (try to get it to aim for belly or genitalia with some kind of musk).
#10 sliced in half with a body guillotine at time of climax, facing up.