Saints Row IV is a power fantasy, pure and simple. You have to give it credit for not pretending to be anything else. Story-wise, don't expect much depth or substance. The writing is often witty, mostly silly, and always entertaining; but don't expect characters to deliver insightful soliloquies or engage in intellectually-charged discourses that will make you reflect upon the meaning of life's various subtleties. If that's what you’re looking for, leave this game on the shelf and take your search elsewhere.
But if you want to have a crazy, amazing time just smashing and blowing things up, and laughing real hard while you're at it, then look no further.