People even suggest training those who suffer from nightmares to practice lucid dreaming. More control over your dream state could avoid the fears that trigger nightmares.
Given the ability, with a little electrical kick, what would you want to dream? Would you create a whole world? Would you just want to walk and explore? Would you even be comfortable administering light electrical pulses through your scalp or for someone to do it for you? And would we become to preoccupied with our dreams and sleep our way through wakefulness?