What do I like?
It's mostly personal.
My lovely wife is from here. So are my wonderful in-laws. I have friends here. I live here. I work here. It's pretty much my home.
My impressions?
It's filled with people more or less doing what people do anywhere else. Trying to make a decent life for themselves and their families.
It is correct that not many Western tourists come here. Most of the tourists are from Japan and China, as well as a handful from other Asian countries. For most of these tourists, it's a shopping trip and for things like K-Pop and K-Dramas (concerts, going to places made famous in dramas, studio tours etc.). Western tourists skip over it because other countries in Asia have better food, better scenery, a friendlier outward appearance (smiling Thais, for example), better architecture, a rougher feel etc.
If I were a tourist, I would not come back here. The downside of Korea is the serious lack of diversity. This is a country that prides itself on homogeneity (read: lack of diversity). I'm not making this up; this literally is a point of pride to many Koreans. Koreans, by and large, view themselves as pure and homogenous. There's a great level of sameness to the cities. The same boring, borderline-Soviet architecture. Sometimes cities will have cool little areas, but there's not the range in character in cities that you'd find in a lot of other countries. The same is true for the food. It's true that there's nothing like Korean food. And it can be tasty. But it seriously lacks diversity and innovation; so much of it is smothered in pepper flakes, pepper paste, garlic and sesame. It lacks outstanding freshness (even if the ingredients are fresh; they're hidden by the seasoning, not enhanced by it. Most Koreans I've encountered truly believe Korean food is the most delicious in the world and that it is inherently better than other cuisines,despite little to no exposure to other cuisines. Frankly, it's viewed as better because it is Korean. Thus, you get something that is unique,but there is no urge to innovate and improve.
I wouldn't compare Korea to any other country. It is unique, as a whole.
It's probably the best reason to come to Korea. There's nothing like it.