I question the validity of much biographical preaching and Bible studies billed as character studies of Biblical figures. Almost by their very nature, by their chosen starting points, such efforts begin by looking in the wrong direction. It is as if Scripture cries "Behold your God!" (cf Is 40:9), and we reply "Thank you, but we have found something more interesting to us."
Dale Ralph Davis, Judges
Of course, there is still a place for some biographical preaching and character studies, but only when it is using the life of Nicodemus (or whoever) to point us to God.