Hi guys! Late to the party, as usual xP
Hrm, Beth, you sell so much that it seems weird that you'd need too much improvement! Obviously a lot of people already like what you're doing :)
I think the ONLY recommendation (and here I'm being nit-picky and a slight hypocrite xP) would be to brighten a few of your listings.
http://www.etsy.com/listing/109822984/skyrim-inspired-oneise-or-shirtI think brighter listings catch attention better (I know, not ALL of my listings are all that bright xP that's why I'm being hypocritical! lol) BUT, you might be able to get more sales that way :) I personally like the patterned backgrounds, but if you ever wanted to go all white you could take photos in natural light (via a natural light lamp or outside) and those pictures (for whatever reason) brighten more easily/better (I'm not a professional photographer, so I wouldn't know).