I dunno about that, blue. I often fear I'm my own worst enemy, although I don't automatically think that of Stew.
It's really hard to light things underwater (because oftentimes you're holding a bulky camera housing, while the current is pulling you away or upside down...also, water is much denser than air, and needs more light to illuminate a subject, so you wind up having to coordinate a strobe)...Also, light levels can change dramatically by ascending or descending a few feet. So I do a lot of work on contrast and color saturation.
Believe it or not, my avatar photo needed no retouching at all. Consequently I can't stand the tosser who took it.