I was a late fan of Bowie. I was not a fan of the Let's Dance Bowie days in college. It was not until my wife played her ChangesBowie greatest hits CD that I started to convert. That at least got me to the point that I started to look for his CDs. And, once I heard "Outside", I became a fan. So, for me, the top 3 are
Outside
Reality
Ziggy Stardust