Jack, I've always been a big fan of your themes, I think you do really well with them. My favorites of this bunch are: number 1 & 7 from CS5 and number 3 & 5 from GIMP.
With number three, the coloring and simplicity of just the image makes it stand out. I think adding text would make it too crowded in a way, leaving it as is was a good choice. With number 5, the color scheme, text and lack of too much brightness/contrast is what I'm a fan of. My one big critque would be to use a little less brightness/contrast in some of the images like number 8 from CS5 for example, on the left hand side it almost makes the text too difficult to clearly see. Using a little less would make the text and other parts of the image stand out more.
Like I said, they look good :) the color schemes are always spot on.