Queen
If you were a piece on the chessboard of life, which piece would you be and why?
A pawn. I am going in one direction and hardly ever veer of course and if I reach the end I will be Kinged. I know that does not happen in chess, but in real life it will.

I'd be that extra queen that comes with the set. I'd love to get in the game, but most of the time, it just doesn't happen.

A pawn... so much potential, but the chances of making it that far? Meh...
Your Pawn doesn't need to make it to the end if it can Checkmate the King instead

Love watching the drama from the sides, hence, I would like to be a:
A Rook Pawn (but not the ^^Wrong Rook Pawn)
^^Rosen, Bernd. Chess Endgame Training (2003) p.61
Knight. Absolutely. For its sense of freedom and the ability to jump over obstructions. Also, forking is sexy
Since this thread clearly allows for making up pieces that don't exist, I'd be a physician. You know, that lesser-known piece that heals other pieces when they're sick or injured instead of killing anyone.
Remember, Chess pieces change their value according the state in the game. "Chess theory", viz. opening, mid-game , endgame.