Okay, here's a list that has a story MOST OF THE TIME. I enjoy reading smut with a sprinkling of plot on the top. Like hot chocolate with marshmallows. The marshmallows aka plot gives it a little extra oomph. Though sometimes the plot is the hot chocolate and the smut is the marshmallows. 

There are also some stories in this list that are 100% smut with NO PLOT. Those are the chocolate bars with no nuts. HAHA.