I mentioned one song earlier, but The Stones have such a big catalogue of songs to choose from, I really love "winter" that's a beautiful song, it goes with the mood too, whatever mood one is in, the type of song goes with it, some songs bring back memories of certain times that were special in my life, in that sense I love Elvis's song "Memories" if I want to get nostalgia I certainly think about songs from that time, so it's hard to pick one song that is your favorite ever.