These kind of questions are so difficult to answer as it's hard to pin down so few songs and it all depends on the mood you're in. The kind of songs that would be in my top five include (1) New Order, "Blue Monday" (original version), (2) The Smiths, "How soon is now" (3) Chic "My forbidden lover" (4) Soft Cell "Sex Dwarf" and (5) Daft Punk "Voyager". Bit of a mixed selection, but all except (5), because it's recent, have 'stood the test of time' and are tracks that I still love and play now 20 years or so after first hearing them.