I'm usually the victim of the chopping block or guillotine but....I also like the idea of watching others receive the chop as well, perhaps even on my command.

I prefer to be the executioner with axe sword or guillotine...or that chinese hay knife type of beheading device.

executioner always, method open

What if I'm really sick and like to write rolls for both ;-) LOL... and both guillotine and axe have appeal... it would depend on the scene I'm setting. If I want some sexual action at very moment of death, guillotine, if it's the death itself, the sensation and actions of it, axe :-)

Victim and the guillotine

I could play the executioner but if it came to the real thing I'll be the victim on the block.

I would be the executioner, a samurai sword would be my weapon of choice. It would be a public beheading and it would be an afternoon event.