When I sit Indian style, I usually have my left leg on the inside, but I sleep with my legs crossed in that position a lot (don't judge me), so I make an effort to put my right leg on the inside sometimes so I balance the stress on my knees.
I don't cross my legs, one over the other, as often as I used to, though, which I assume is what this thread is about. I do it at restaurants and that's literally the only time I can think of that I do it. I don't really have a preference of which leg is on top, I usually just switch legs to avoid kicking the person across from me.