In my case, I really didn't listen to his music after he died. I wish I'd gotten to know him better like others had for many years, so I could really experience his decades of influence on American music and culture.
As for my two cents, I think Cash's version of "Hurt" is better than the original by Trent Reznor. I don't if its because of Cash's voice and background or the fact that he sang it just before he died.
Though I believe we all will feel this way and one time or another in our lives.