Diversity and accessibility are the factors I consider most important. Diversity of faculty is difficult to attain.
Most faculty members are lawyers who have worked long enough to gain a reputation in their field.
This almost guarantees that they are white males, since that's what virtually all lawyers were until a few years ago, and the vast majority still are. The shortage of women and minorities on the faculty is multiplied by the problems they face in gaining a reputation in their field. Accessibility is more difficult to measure. Famous professors, authors of landmark treatises and litigators of great cases may not be as accessible as their less-pursued colleagues. But it can affect the quality of some services.