Warren, as a fan of the KISS principle, I'm probably not the best person to ask! This comes across as another site that is more of a demonstration of a clever web designer than showcasing your photographs I am afraid. And personally I feel that the design gets in the way of engagement with the images, rather than encouraging it.
As a showcase for a web designer trying to get clients in need of, or impressed by, that sort of thing, it would proably be more effective.
What I want to see on a commercial (i.e. not hobby) photographer's site before I go mousing about trying to work out where to find stuff is: who he is, what he specialises in, where he works, where I can contact him, and very importantly a quick taster of his style of work. After that, if I am hooked, I'll spend time looking at galleries (assuming I can work out how they operate and don't take minutes to display); reading about what makes him tick, etc.
Faced with Flash for the sake of it, I'll probably just cast my eyes up and go elsewhere, unless I have a specific reason for persevering.
Anything that flashes or includes movement tends to remind people of ads and may be counterproductive for that reason. Have you noticed how you can visit a site and home in on the static content you want to read, ignoring all the visual clutter round the edges?
Of course I am not necessarily typical of the target audience, and this opinion is worth what you paid for it.
BTW: how important is SEO to you? The two links I found in Google semed to point to now non-existent pages and be redirected. If the change is recent, that might be a sign of plummeting rankings.