Red book CDs are by far my favorite source, especially for the type of listening I do. I'm not crazy about the first pass of any recording. I usually pay attention to a recording around the 3rd pass. For that reason I like Long Play and on repeat. That shoots it in the foot for tape and vinyl, but that's me and the way I listen. Others who take more of a DJ approach (back to back) listening, not letting the system settle, have a completely different view of the sound.
For myself, it's premature to listen before a system (including room) has a chance to harmonize with the audio signal, with all of it's mechanics involved. I can deal with FM and streaming but with start and stop mediums CD is a fantastic way to get to the musicality.
we all have our own thing, for me CD is the champ
michael green