only make galleries to separate the images. if people only want pillows, they can look for that in the search.
make things you want to make. you won't know what will sell until it does. as it sells, make more of those things. maintain a style. if you make things your not interested in, you'll never make them well. do it your own way despite what others say.... however keep in mind these will go in someone's house, and if you only have one theme or they aren't interesting, they may never sell.
you might sell a number of blue things... that may be the theme you can lean in. but you do want to diversify and create many different kinds of things. otherwise you'll only have one audience.
---Mike Savad
MikeSavad.com