Interesting prompt...
Haha yeah the first thing that came to my mind is that I would get chubby real fast. I love peanut butter!
I think I would love it at first and just be happy with life... then I'd get sick of it real fast.
That's fair. There would be a lot of hazards as well, like it'd be super easy to sink into a pit of peanut butter and drown. Like quick sand but peanut butter.