When Brendan was a baby, I played music on the iPod for him before bed and would sometimes sing along to the music but never really sang to him on my own. Sometimes, Tim would sing him "Dixie Lullaby" by Pat Green whenever he was trying to put him to sleep. My favorite song with him was "Lullaby" by the Dixie Chicks and I played it a lot on the iPod for him.
When Griffin was born and we started a bedtime routine, I didn't have an iPod in the room with him so I was "forced" to sing. I can never remember all the words to the Dixie Chicks' song, but for some reason I am easily able to remember all of the lyrics to Dixie Lullaby that Tim used to sing. So, it is now part of our routine every night that I read Griffin "Goodnight Moon" and then I turn the light out and rock him and sing Dixie Lullaby while he finishes eating.
Do you have a special song you sing your kids? Or, if you don't have kids, is there a song you think you will want to sing to them when you have kids?