Personally, I'm not a fan of using Flash, but that's just me. The Flash your site uses loads every picture two or three times for some reason.
• On several of the galleries, there's an issue where the large picture slideshow doesn't cover the underlying title.
For example, on the "Stock images" page, while viewing the larger pictures, the letter "s" sticks out the side. On the "families, babies, weddings" page, the letters "ngs" stick out the side. Also happens on the "Travel images" page with an "s" sticking out.
• It's not obvious (at least to me) that the home page has a slideshow with a number of large pictures, two(?) of which are repeated. Almost all of these pictures are soft and need to be sharpened.
• Several pictures have odd crops such as cropping off a hand, arm or neck, where such limbs are probably necessary for the picture. (i.e. I think some crops are much too tight).
• The large version of the photo of the four orange flowers is missing.
• Some of the pictures have only sides or backs of heads which doesn't make for much of a picture. Or, the main person in the photo is partially obscured by other people or objects.
• Don't you wish Toronto was more visually inspired like Chicago?
• Some stock pictures need to have stronger graphic appeal, stronger lines or stronger overall composition. (Although, some of your stock pictures on the agency's site are quite good.)
An author was once asked about writing his latest book. He replied, "Writing the words down on paper was easy. Getting them in the right order was the hard part."
Similarly, it's not just the content of the picture that's important but it's how you arrange that content.
• Several pictures are over-exposed or the highlights are seriously blown, which would make print reproduction difficult. Over-exposed pictures don't hold colour saturation. Plus, on uncoated newsprint, ~15% K (and lower) usually gets clipped. Magazines might be better.
(Edit: removed some picture samples)