I don’t know how to find the wordpress themes, for me, every time when I want to change a new templates, then I will type the keywords in the forms of Google, and then research the themes, and most time, I just search on the web, then get the reasults, click in to the websites and browse the wordpresss templates pictures and ready to choose.
You may also have these experiences, after you have re-searched for many hours, still you can not find a good wordpress templates. In fact, you can use Google Image search! The Google image search is really a powerful tool,you can find the templates what you want, really!
For example, you want a pink wordpress theme, then you can search the key words on Google Image, also you can search in web, but if you search in image, you can find the pink themes directly.