I actually fell in love with fantasy genre after watching Goblin. This is what I'm looking for.

LIKE

Touched my heart

Bromance between Kim Shin and Grim Reaper
Another side of Yoo Deok Hwa (loved his seriousness unlike the usual goofy self)
Ji Eun Tak's decision that touched my heart (I cried every time I watched that scene)

Gave me goosebumps

Kim Shin realised Ji Eun Tak knew his secret (that moment my heart really stopped)
Park Joong Hun's character (I paused the drama to look around me making sure I'm still sane)

DISLIKE

Nothing, I never even skipped a scene.

MUSIC - my personal fav

Stay With Me - Punch (ft. EXO Chanyeol)
Round and Round - Heize (ft. Han SooJi)

REWATCH VALUE

Definitely as I have re-watched at least twice. Though the first gave me more goosebumps and mini heart attacks, the second and third time were equally awesome.