Depends what you want to analyze
Some people get plot-continuity technical.
Others, like my brother say things like "but are the characters likable" and "does the plot develop"
Others want to know how many things the characters do, whether funny or not
Some people combine fun with themes and with character expressions and actions, like me :3
EDIT: Well, I do care about plot, I just see it in a more imaginative perspective: as if these LBT stories really were real, rather than whether they simply 'entertained' me...