I use them just because it can provide more information. Look at them in passing when you didn't quite make out what someone said. Also subtitles for foreign films, I dont like watching dubbed.
Agreed! I turned them on for the first time during my binge through Mad Men. There is so much whispered/muttered in that show that I would have missed otherwise. Plus, I'm a terrible listener so glancing at them from time to help so much.