I am right-handed and I use my left foot; let's me sit centered on the needle.

I am left handed. My machine actually doesn't have a floor pedal, it has a lever that attaches to the stand my machine is in and is pressed to the side with my knee- it's on the right side. It's all I've ever used for a machine and it feels natural to me. I do think that I'm a little ambidextrous when it comes to which of my feet are dominant, though- when I played soccer in high school, I definitely favored my right foot, and when I did ballet going on point on my left foot felt more comfortable. I guess maybe I'm a little mixed up, lol!

I do think that people are pretty adaptable, though- when someone has to have a limb amputated, they learn to make use of the others pretty quickly! I'm sure you could adjust to using the other leg if needed.

Since I am in Australia to me you drive on the opposite side of the road to me that is why you drive with your left foot where I use my right. It means that what ever foot we drive the car is the same foot that you drive your sewing machine.

It's basically an accelerator pedal, so no brainer!