Ambidextrous.
But ... when I started cycling, I rode with toe clips and, for whatever reason, I removed my left foot and put it on the ground when I came to a stop. I don't know why ... it just felt natural.
When I got clipless pedals, several people told me that I must learn to unclip with my right foot instead of the left foot. They told me it would be easier to unclip and clip with that foot ... perhaps they presumed it was my dominant foot. So I retrained myself to unclip and clip with my right foot. I fell 3 times in that process.
Of course now I realise that it didn't matter, and I should not have believed those people. I could have kept unclipping with my left foot, and could have saved myself 3 falls.
Nevertheless, I now feel more comfortable unclipping and clipping with my right foot.
What side of the bicycle do you stand on when you are preparing to get on your bicycle ... and a related question, which leg do you throw over the bicycle first?