7 - It's okay. Doesn't seem like a very high quality image, nor the best Dark Tower artwork you could make an avatar from. You did mention that in your post however.
Flop: 6, just seems like a random image from a film. Can't really see how it represents anything or shows the posters personality
The Dark Tower is a seiries of books by Stephen King, the fiinal part is just about to be released, hence his use of it.
KoC, I'd agree with Kotario, but I'd give it a 5. Not a great quality image, too clichéd and too small.
EDIT -
Executioner: 6. I don't really like the use of flags for that kind of thing, smacks of nationalism (not that I'm accusing you of that, but ...). IUt's also kind of dull, being just a diagram of the flag, rather than a picture.
I've put pictures in so that the thread will continue to make sense to future readers. Is that a good idea or not (in terms of load times etc)?
DarkCorp - 7, for nostalgia. Reminds me of one platform game from ZX spectrum for some strange reason. & it's a tad menacing, too. Which's a good thing.