This show irritated me on so many levels! The story was so simplistic, which in and of itself wasn't a problem, but there was SO MUCH TIME of watching the main couple walking around, her being depressed, him trying to cheer her up. I didn't have problems with the actors (though Park Shin Hye does tend to stick with the doe-eyed somewhat unhappy girl), but the characters were so tremendously irritating!
The character of Go Dok Mi is a recluse as a result of something in her past, WAY in her past. She seemed to be someone that wallowed in her misery, so it was hard to like her or root for her. She seriously should have sought counseling. Throughout the whole show, I felt like I was watching Eeyore whenever she was on screen. I was starting to feel like I needed to take antidepressants.
The character of Enrique Geum - I didn't like him at all. He was hyper, extremely immature, pouty, talked fast and yelled a lot. I never was able to warm up to him, even up to the end.
The character of Oh Jin Rok - I loved this character and he was the saving grace for this drama, as far as I was concerned. Deep, quiet, abiding love. Always wanting Dok Mi to be happy. He was the maturity that this show needed.
All of the women side characters were awful and were typical trope-filled caricatures - evil, manipulative, lying, bullying.

I felt there was no chemistry between the leads. She was too cold, her was too immature. Sure, he finally got her out of her apartment, but I didn't feel them growing toward one another, or even in their separate lives. Two kisses, one really staged, the one at the end was better.

The time jump, that apparently has to be in EVERY Asian drama, was poorly handled. In this day of cell phones and air travel, him being gone for over a year made no sense, especially since they both had jobs where they could literally work anywhere.

So, this one is a definite NO on the rewatch list for me!