My favorite hymn:
Silent Night, I can't find my favorite version, but that's probably for the best right now so I can get things done other than listening to it. That one version I listened to so many years ago as a child has carried me through countless years of poorly done renditions. It captured the essence of the song and I still have not forgotten it.
Kind of like this, I'm sure you can get the picture:
https://www.youtube.com/watch?v=j6O5rZbgD4A
For least favorite hymn I'll go for the ground-touchingly low fruit of Bethel Music's heretical abomination of worship: Reckless Love
As you may be able to tell, I have had the misfortune of having to listen to this blasphemy over and over again over radio and in churches that did not have enough thought put into song selection. The trouble is how close it is to being slightly above average contemporary music when it all of a sudden switches to lying about and slandering the very God they proclaimed to worship.
I guess I have too much time to form adjectives with.