Seoul is the ubiquitous metropolitan city to go if you visit Korea. Though it is my 3rd time visiting Korea, this is only my 2nd time in Seoul.
The standard places are Hongdae, Myeondong, N Seoul Tower, and the palaces. I had planned only one full day in Seoul this time so I only managed to visit Gyeongbokgung Palace and missed the others.
On the 1st leg, it was not cold, just mild. Around 15 degC and I only needed my suit jacket and a T-shirt. But on the 2nd leg (before returning to SG), it was no more than 10 degC in midday and I needed an extra layer to barely keep warm.
I didn't do much here, mainly just refamiliarising the places I last been 8 years ago. But this time round I have better camera gear and improved techniques to capture better photos of the beautiful pavilion in Gyeongbokgung. I wanted cleaner photos of the palace but it was impossibly crowded.
To be honest, on my 2nd visit, it was really not so special a city. Apart from the cultural heritage and the places of interest, I really don't find Seoul that interesting anymore.
I give Seoul 3.5/5 stars.