Something you can't make a list of

Question: What is something of which there are multiple, but you can't make full a list of, while you can make a list of the worst ones.

Question: What has a bed that you can't sleep in?

Question: What tastes better than it smells?

Question: What goes in the water black and comes out red?

Question: What asks but never answers?

Question: I have 6 faces and 21 eyes, but can't see a thing. What am I?