When I am looking for things for my girls three things stand out to me
1. Unique - I like things that are one of a kind
2. Animal Print - I love animal print.
3. Girly, Girly, and more girly.
As far as color goes, I like the brighter colors. Pinks, lime green, reds, etc. I also like prints that are fun too. For example, I love Hello Kitty. I will try to find a few links to some prints maybe to help you out.
Hope that helps!
Thought of something else. I tend to love prints that have Yorkies on them. I have a cloud 9 with the Yorkie Love print and a dress that is pink with Yorkies on it and a harness with a Yorkie on it.