I like to sing lots of xmas carols. My daughter listens to them all year round. They are associated with some nice times.
One of my favorite songs to sing and pick out on a keyboard (by the numbers) is Amazing Grace (partially because I think I can sing it
).
It might be hard to get what goes through my mind while singing. If it is in a church (not been for a few years but used to do church parade with the scouts when I was a leader) I have part of my mind like an anthropologist visiting an alien culture. I just enjoy it about like I like reading about Egyptian and Greek myths. They are imaginative fun and part of our cultural background.
I don't know why anyone would make a big deal out of it all.
(short funny story: When my son was about 6 the beaver troop went to church parade at xmas time to sing and stuff. The next day he mentioned that "they say bad things in there". I asked what he meant and he says " they sang 'Jesus Christ'! ". (as in "and Jesus Christ was born" )
)
I had to explain that it wasn't swearing then.
At about 11 my daughter was interested in religions and wanted to go to Sunday school so we took her. She also borrowed comparative religions books from a minister friend. She and I talked about what I believed.
It lasted about 6 months before her conclusion was: "They all believe they are right and they all believe different things.".
In the last 2 or 3 years I have to remind her that not all so-called "Christians" are like what she finds on FSTDTs (fundies say the darndest things) or here. They have helped make her a somewhat militant atheist.