Further to Gorgo's good tips,
- bending knees (a little) allows you to absorbs shocks and bumps when going fast in chop or waves, with the rear knee typically bent more than the front knee
- bend your knees to get out over broken waves in surf "absorb the wave" - particularly important if riding strapless
Where the "poo stance" is most noticeable is beginners trying to get riding on the board for the first time. They can get scared of getting pulled over their toes so they squat back like they are on a throne. This is often combined with looking at the kite and flying it to far forward to the edge of the wind window. The end result is sinking backing into the water bottom first.
Not an issue for you Cam, but for others to avoid this:
- Do a bigger power stroke with the kite, dive it from high
- When the power kicks in lift yourself from the water (bar in), pointing the board downwind
- As you get up and going fast downwind - straighten your legs
- Edge the board, keep your front leg straight, and bend your back knee, using it to edge and steer the board
- Look where you want to go
- Fly the kite back up from the power dive, but not too high.
- Back the power off by pushing the bar it if you are out of control and/or going to fast.
- voila, you're going . . .
More details:
kitesurfing-handbook.peterskiteboarding.com/progression/water-start