looking quick i imagine a queen might be a little faster but a knight promotion always looks pretty
Fairly chess

A Queen would have saved you some moves. In the position, an underpromotion to a Knight would result in you being up a Rook, while a promotion to a Queen would result in you being up a Queen, as your opponent cannot avoid a Rook trade or worse.
As a general rule, always promote to Queen, unless it's necessary for an underpromotion, e.g., underpromoting to a Knight when its necessary to gain a tempo with a check or a Rook when a Queen would stalemate.
Just my two cents.
Barefoot_Player
PS - I love underpromotions! =)
I am playing a tournament at my town, and in this game my oponnent made a blunder in a drawn endgame and I promoted my last pawn. I was tired after 3 hours playing and, so quick, I played this winning move, but my question is if you think it is unpleasant to do this: