Its true about it being natural, as a 'goofy' snowboarder with a mate who is regular it means any sport like cycling/snowboarding/watersking etc means you favour one leg over the other,
For me this includes always unclipping my left foot first and only being comfy starting a tricky section with my right foot clipped in.
Having said all that, as a snowboarder i try and spend as much time as i can riding regular (feels really wrong to start with) as its the only way to progress (180's,etc).
Last year we hired an instructer for a few hours and he had us riding the chair lifts with the wrong foot clipped in!!
Try that this winter…
I'm sure we can all learn to most stuff with either foot, we don't because we are too comfy/lazy/not enough time to learn.