No, click on the heart to add to favorites, but how do you see the posters that you have added to it?
It's easy, just go to your profile (up, when "logged in as 'you'" and two list will be there:
-Your uploaded posters (click more for watching them all)
-Your favourite posters (click more for watching them all)
There are too one I think is the tags you used the most, and some information of your account. You can see everyone's profile too clicking on his nick in the forum and too in the posters he has uploaded.
Anyway, you can't choose the way of ordering them, and the default way I think is the added one. So you can make favourites in some order but won't be able to change it after that.