Hey Turbine, increase sales of your optional races (Half-Elf, Half-Orc, Warforged, Drow) by adding True Reincarnation perks based on race, like you do today with classes. Examples:
Past Life: Half-Orc
You were a half-orc in a past life. You occasionally find yourself filled with a nearly irresistable urge to rage. Each time you acquire this feat you gain +1 STR and +1 Intimidate. This feat can be stacked up to three times.
Past Life: Warforged
You were a warforged in a past life. You occasionally find yourself filled thumping your chest with vitality. Each time you acquire this feat you gain +1 CON and +1 Concentration. This feat can be stacked up to three times.
These game mechanics are just examples.