Analog film photography and cameras

Rotating because it's looks tilted,
flipping because it looks more 'stable' that way,
and it's more pleasant to 'enter' the picture (as most of us are used to reading from left to right).

I don't think I'd accept that as a general rule--I haven't experimented with it, and I'm just speculating here, but perhaps 'entering' the picture from the ship, not the sea, is part of its effect on me. The reason why I commented on it is because it made me feel that particular sense of vastness, and I could imagine that that would be compromised if it was more 'pleasant' to look at.