Lists in favorites

Not sure if this has been spoken about anywhere else already, but am I the only one who thinks it would be great to make lists in your favorite images? I know you can search on the standard tags, but still, I think it could be great to make your own lists on things as biceps peaks, hair colour, anything. Any possibilities?

100%. Would be more useful than tags when trying to find something

I like this idea, i would definitely use it a lot. However, customized lists would inevitably almost be like an entire personalized tagging system that would need to be moderated.