I'm an advanced scuba diver, what do I fear most?

I have had a white shark swim up to me once a few months ago diving, we see big sharks almost every time we go into the water here. Also saw a whale shark about a month ago.

Had orcas swim up to the boat in Baja last year, but I was in the boat at the time. My friend swam with them.

I would say the white shark was scariest, because we never see them so have no idea how the behave.