It's tough, but my favorite Stones song is probably "Gimme Shelter," followed by "Long Long While," a somewhat obscure (in America, anyway) slow blues number that was originally the b-side to "Paint It, Black" in the U.K. This is closely followed by #3, "Out of Time." The Ramones did a pretty good cover of this song on their '93 album, "Acid Eaters," which was all covers.