Rochester's range, the beauty of some of his poems, their psychological acuity.  His account of fear and the self-sustaining paradoxes of mutual fear, including the fear of being thought fearful. Dr.  Johnson's quotation of his bon mot: "All men would be cowards if they durst."  Obscenity of "The Imperfect Enjoyment" but even there Rochester's surprising acknowledgment of women's experience. Definitely not safe for work!