Your choice of race affects many different aspects of your character. It establishes fundamental qualities that exist throughout your character's adventuring career.
Class is more than a profession; it's your character's calling, shaping the way you think about the world and interact with it and your relationship with other people and powers in the multiverse.
Every story has a beginning. Your character's background reveals where you came from, how you became an adventurer, and your place in the world.
A feat represents a talent or an area of expertise that gives a character special capabilites. It embodies training, experience, and abilities beyond what a class provides.