What an interesting thread!

Religious songs can speak to us for so many different reasons...the melody may be very moving/stirring, the lyrics might be particularly relevant for our personal situation, or the song may have good associations from when we've sung it in the past. The latter reason, I'm sure, why songs people had at their wedding or Christmas songs have been mentioned.

For me I like the simplicity of "Dear Lord and Father of mankind", love the celtic tune of "Be Thou my vision" (especially the way we play it in our band at church with drums and celtic whistles) and also "What a friend we have in Jesus" because God used that song to help me find a fellow Christian when I was living in Japan and felt my faith was ebbing due to lack of fellowship.

Finally, "O Love that will not let me go" - I can't sing the verse about tracing the rainbow without getting choked up!!!