There are so many favorites already mentioned but dating back to 1864 or earlier is: How Can I Keep From Singing.I also love the Shaker hymns for their simplicity, as in: Simple Gifts.
A favorite spiritualis: Let Us Break Bread. And the first hymn I learned is the sweetest i.e., Amazing Grace.
Thanks Praise for the thread. Made me stop and hear so many hymns, albeit in my head.
bflat