Also among my tops are The Beatles' I'm Only Sleeping, Led Zeppelin's No Quarter, Rush's 2112, The Who's Baba O'Riley, and The Doors' Spanish Caravan.
But I'm more of an album person, not really individual songs. As such, my top albums (after 5, there are too many to list them in an order, but these are in order from the greatest album of all time on down):
1. Revolver - The Beatles
2. Tommy - The Who
3. The Dark Side of the Moon - Pink Floyd
4. Who's Next - The Who
5. Led Zeppelin IV