Pantser or Plotter?

Recently my younger son lamented about a playdate with his cousins. He planned everything they would do, even the script he would use when the youngest cousin asked to play with his hamster. He was so concerned that everything would go just right.

If my son were a writer, he'd for sure be a plotter.

I do not write this way. Even creating a synopsis before the manuscript is finished is terrifying for me. I don't like to have everything all planned out (which is the exact opposite of how I live the rest of my life.) I like to have a general idea of the beginning, middle, and end -- but I like to let the character's actions push and pull the story along. Having a "plan", in my eyes, does not allow me to write organically.

I am a pantser.

Plotter vs. pantser. I've seen many discussions as to what other writers consider themselves. To each is own, is my motto.

When I come up with a story idea, I let it simmer for a while before I sit down at the computer. I think about it when I'm standing on line at the grocery store, when I'm cleaning the kitchen, or when I'm driving alone. The characters start to take on a life of their own. When I do finally sit down to write, most of the time the story pours out of me. Often times, I don't even remember what I've written when I go back and read what's on the screen. That is a freaky feeling. When that happens, I know that I've got my mojo. The sentences don't come out in chunks; they flow like tap water.

How do you write? Plotter? Pantser? A little of both?