Honestly, I'd have to know a lot more about you, your interests when visiting other places, and your tolerance for several things (like spicy foods, being gawked at, and body image) before I can really break down the positives and negatives about potentially visiting.
But, my experiences with Korea are colored by the family members I have there and that the majority of my experiences have been limited to the city. I've probably spent at most 2-4 weeks total in the countryside during all of my trips there, and always with family members.
Additionally, what is your Korean Language ability? None, basic communication, or higher?