you certainly like feathers... it really depends who you market to. my buyers aren't yours and so on... i would market to bird watchers, ornithologists, homeopaths, indians, shamens etc. you do want more keywords than that.
if your using art to escape that's good. if your doing it for money, it could be depressing. however you can't compare yourself to everyone since we make different things.
i would however expand to different kinds of feathers since you have the theme going already. peacock, parrot, etc. then give us an idea what bird they came from.
---Mike Savad
MikeSavad.com