It doesn't take much for me to like something but either thing in a series is definitely good!! If I had to chose between them I would say interesting story over art. But good art is just asdfghjkhgfds
Even though I don't think I could keep up with a series that was boring even if the art was good. I would try though. I would definitely try. And I usually can. It really depends.
Sorry for rambling.
And I have to agree with TiaPrincessNews.