I personally think it is very important. I come from JMU and UTK. I did my undergraduate at JMU and most of my professors were very accessible. You could pretty much walk up to their offices and they would be there ready to help. At UT-Knoxville, it was a completely different story. I did my graduate work there, and I was not happy. Half the time professors weren’t even on campus, unless they had an undergraduate class to teach. By and large, it took them days to answer emails, if they answered you at all. And this was in graduate school! Granted, law school is a different beast, but after my two completely different experiences, I know that I am looking for a faculty that is open and easily accessible.