If I had to chose between being called a plotter or a pantser writer I am definitely a pantser. I have never worked with a solid outline or arc for my novels, whether they are mystery, historical, romance, or young adult. And this is mainly because I find that my characters seldom end up the way I first pictured them and the plot never takes the route I thought it would.
I either start with an idea or a character and decide the setting and then start writing. I do begin the story with a character in his/her everyday life so the reader can get to know them then I put in the trigger that is out of the control of my main character or starts the mystery. This puts the main character on his/her quest for a solution.