As someone who grew up in an era where tags were the labels on clothes I'm not in the least anal about this. I hate if the tags are absent (nothing worse than track 1 unknown artist etc) but as long as the basics are there --- artiste, title, album and the tracks are in numerical NOT alphabetical order (unless for some bizarre reason they coinicide) --- I really couldn't care less about year, producer, label, genre or any of the rest of that minutiae that you are all getting bent out of shape about.
Life's too short. Well, mine is, anyway...
Oh, but spelling is important and if EVERYTHING IS CAPITALISED I'll change that.