ViolinGal, you touched on a very important factor here: the way these dramas are presented to new drama viewers.
I'm certainly not going to discuss right or wrong when it comes to taste (I too like things that can be viewed as awful by many and dislike others just because), but it's a sad fact than many viewers are indeed influenced by the general opinion, in the bad and the good. It's the inner workings of mass consensus.
So, I'm not bothered by the fact that my opinion may not be shared, but I am slightly irked by the bombardment of pics, hearts, ravings, charts, blogs, articles and you name it. Producers use mass consensus to decide on what to promote and what not, in a neverending circle. In the end, we may very well bet that another 1000 Heirs or Oh My Venus are going to be produced in the wake of their popular precedessors.