Have we done this one before?
Blondie says below that her favorite hymn is: "What do we want? Peace. When do we want it? Now." I'm pretty sure she's kidding (but then again, maybe not).
I'm not a religious person, and I've never cottoned to those protestant "Shall We Gather at the River" type hymns. Some of the Catholic hymns are alright, but most are just boring, boring, boring. But I do love a lot of black gospel music. Have you ever attended an African-American church in the south on a Sunday morning? If you haven't, you should definitely try it. You'll never think those folks on American Idiot are great singers again. Black gospel music comes from a place in the soul that's way down deep; it moves me. My personal favorite is "Oh Happy Day".
What's your favorite? Feel free to be as creative as you want (as if we could stop you!).