I'm really weird about completing games, I usually go for 100%.
The weird part is that I want to read every piece of dialogue no metter how small the change is from a different choice.
Usually this does't end up working out and I still enjoy the games, but I guess I prefer a low amount of...
Most low quality VN usally are completely silent, compered to higher quality ones which usually have a great sound design.
For music it's kind of hit or miss, one of the best examples that come to mind is Neko Paradise.