According to The Art of the Bonsai Potato, Bonsai Potato is "the art of nurturing the artistic vision of a potato through various forms of encouragement and manipulation." To me, a Bonsai Potato can be so much more.
I find that the 30 to 45 seconds that I spend trimming, whispering encouraging remarks or just admiring my Bonsai Potato are the most relaxing moments of my day. I get a sense of accomplishment and camaraderie when friends and family look at my potato and say "...um...wow," and I always have plausible evidence for an insanity plea, "just in case."