Mal,
First, send my congrats to Kerry for getting her C-card! Hopefully we'll get the opportunity to see you both underwater sometime!
Second, one suggestion I can make is to "get closer" and then "get even closer still!". I still struggle with this one - especially with wider angle work. It is so much harder to figure out the light fall off on those shots!
Luckily it looks like you get to get way more opportunity for practice than I do, so I'm sure your UW photos will be improving by leaps and bounds!
Keep 'em coming!
- Bill
PS: I will offer you the same offer I made to Karl. If you find you need someone to carry all your gear, I'll gladly take the job for room/board/dive fees!