Because of all the criticism, thought this would be worst than first season. I actually enjoyed it more, first season had too much going on, wasting a lot of time with minor plots. Lee Joon Gi's acting is surely different from Song Joong Ki's, so the characters are portrait differently.
Also let's not forget there is a 7 year gap between the events from season one and two, they are not teenagers anymore. Same can be said of other characters, they are not goofy anymore. Can't wait to see how Saya turns out on season 3, he's my favourite now ?