The Player is the entity that represents the person that plays the game, which is to say -- you. The Player is approximately 6 feet tall, similar to average height in the western world today.
The Player must be one of the six playable races: Humans, Apex, Avians, Floran, Hylotl or Glitch. Race will not affect player stats, but will change the visual representation of the character and objects they craft, along with the basic armor tier.
Many of the Player's characteristics can be altered, judging from what has been released, including his/her clothes, hair, and stance, among others. A reproduction of the character creator has been added to the forums (forum account required). It has been confirmed by Chucklefish that there will be more options in the in-game character editor.