there's no accounting for taste
People like or dislike things for inexplicable reasons. How this utter trash could be at the top of the box office for three weeks is beyond me. There's no accounting for taste, I guess. John's new boyfriend is kind of a bore to be honest, but John seems to be absolutely smitten with him. There's no accounting for taste.
no accounting for tastes, there's
Individual likes and dislikes defy explanation, as in They painted their house purple-there's really no accounting for tastes. This expression, first put as no disputing about tastes, dates from the mid-1600s; the present wording was first recorded in 1794. A mid-20th-century synonym that originated in the American South is different strokes for different folks. For a far older synonym, see one man's meat.