Image 8)
Black/Moor goldfish. Love the orange belly.

Image 7)
Like the painting, definition nice.

Image 6)
Good "flow" on the fins, like the water ripples...

Image 5)Likes this, but not really defined enough...
Don't care for bubble eye goldfish.

Image 4)
like this, pretty image/fish

Image 3)
Ryukin type goldfish

Image 2)
Like the sketch effect, but I like the Sumi/Brush types as well.