Keeping media on your computer has some great benefits. Watching movies directly from your hard drive saves battery life. DVDs scratch easily, so backing up lets you have some peace of mind.
Now here’s the problem: You don’t have any visual cues as to what is what. Rather than looking for the covers and cases you know so well, you must rely on the same sterile document icon (or preview of the first scene of the movie if you have icon previews on) and the small label underneath.