Mine is South Korea, particularly Seoul and Busan. Seoul for the city life and Busan for the beach life.
I enjoyed the DMZ tour, Gyeongbokgung Palace, Bukchon Hanok Village, and N Tower, and the nightlife in Seoul. In Busan, I love Haeundae Beach and Songdo Beach.
Aside from the lovely buildings and shopping markets, I also love going to Korea to indulge in their food. Personally, I love Kimchi, Samgyeupsal, tteokbokki, and ramyeon.
Anyone wishing to visit South Korea and go to these places or you want to indulge in food tours, connecting to a local guide might be helpful for you as they were during our travel. Found this article that might help you decide
https://gowithguide.com/blog/hiring-a-guide-in-south-korea-pros-and-cons-5288