I'd actually pay a few bucks each for the Sony Music/Walkman app and their Gallery app. Just got so used to using them over the years and visually, they just look so slick compared to any other comparable free apps.I'm fond of the SicMu app from the F-Droid repository (well, mostly because it was free). I have VLC too, but SicMu seemed better on the phone. It doesn't whip a llama's ass or anything though.
Paying for a music app...what's next, paying for water?