not a fan of handcuffs, so I'd pick the blindfold/gag and rope.
become bald at the request of a Dominant - to be done as a shaving scene in a dungeon. or give oral sex to someone who has abundant pubic hair, as a their first time recieving oral sex?
I'd put my partner in chastity for a year ( more fun to tease them lol )
Become a benefactor of a brick and mortar erotica library or fuck a window washer on the scaffold they use to wash windows at least 20 stories high (can go higher but not lower) ?
Be a One Night Only Trance/Dubstep DJ to a Rave Concert or Survive a grueling 10 hour /5 week long Bootcamp and earn an Honorary Military Rank that grants you Top Clearance to Weird Paranormal Cases World Wide?