As for YHs dramas I love The Package, think he did make the right choice there. Dunno about the ratings... maybe the big three generally have higher ratings? And even if Heirs had better ratings than Marry him if you dare, the over all message of the drama was a lot more interessting, sth I still remember.
I have seen both My first Love aka. Longing Hearts and Hospital Ship. I personally really liked JS's drama, it's kinda cute, sometimes funny but also sad. Hospital Ship was alright, not really my thing, it does show a bit the situation of islands having no hospital in Korea though, so it's actually informative. But regardles of what people say, I think MHs emotional scenes got better.
Evergreen aka. That Man Oh Soo seems good, I need to see the ending to make a final rating, some parts are a little off. Like how people in horror movies always think it's a good idea to split up, kind of things, you know^^ (just an example to not spoil anything)
Hope that helps a litte although I am biased after all ^^