lizbot.etsy.com- I really like the nautical stuff you have. It appears as though you have some shadows in your lighting, you might want to find a way to brighten up the pictures so that the details show better.
m- I agree with what has already been said, you need brighter photos. I always take my pics in bright daylight, but for some reason they still come out dark. I have to fiddle with the brightness in photoshop or on my microsoft photo editing program that is already installed with my Windows XP. You should also crop your main photo of each item so that they it is already square. Etsy puts square photos on the front page of the shops and it's better if important elements aren't cut off.