Thanks for the kind comments everyone!
Mike, you're right, Jim gets incredible shots...especially given all the stuff he's doing at the time. It's also hilarious when you're close up to him and you can hear him talking at / to the sharks! The guy has to be completely unique and it's easy to see why he's very well liked and has an army of fans....certainly I'm one of them!
Some nice shots on your website. Re settings etc, I tended to ask Jim for his recommendations at each site - they varied across the range from manual, aperture priority and shutter priority, but almost always with 200 ISO. Most times though I tended to use Aperture priority, typically f8 or 11, center weighted metering.
As for strobe positioning, I've got relatively short arms at the moment but still tried to get the strobes behind the lens and pointing outwards - generally I got relatively little backscatter as a result. I didn't move the strobes about too much though as to be honest, at my level, it was just going to be overload for me.
My goal on the trip was simply just to get some reasonable shots, nothing fancy or technical, and I'm happy with what I got. The processing aspect is an another area I have a lot to learn about - I always shot in raw though and used Canon's Digital Photo Professional, cropped here and there and changed the white balance if needed.
I agree that it's easy to get frustrated seeing Jim shoot such great pics.....but he's been doing it for a while and is a real pro. For me it was about setting realistic expectations but also trying to learn from Jim and seek advice where required.
Ben