Since I'm left footed, I would take much better corners from the left side because the ball would curve away from the goal, which allows someone to head it in. If I curve from the right corner, the ball goes towards the goal and makes it much harder to head.

I would expect the opposite for free kicks. If the ball is on the right, it is easier to kick it in with the left foot.

This is all just based on my experience when I used to play in high school/college. Of course, this is top11. The better question is whether left/right foot matters for anything at all.