I’m not super picky with my dramas. I generally like tropes and enjoy a huge variety of styles.
For me, the two leads’ chemistry is what kept me watching. I loved how comfortable they seemed to be with each other and nothing felt forced. That part was endearing to watch (even during the happy couple moments I found myself smiling when typically I feel those lovey-dovey times in dramas can get over the top and annoying).
Overall the serial killer trope ruined a lot of it for me. I feel they could have had a wonderful story without that aspect entirely and I found myself rolling my eyes any time he was involved. As a result there were several large plot holes left that would have benefit from having more focus.
I don’t regret watching it. It was cute for what it is and I really appreciated the wonderful chemistry as well as the starring of some of my favorite secondary actors, but it lost a lot of points relying too heavily on tropes to propel what otherwise would have been a wonderful plot if given a bit more thought