I'm so sorry for the delay in responding, Queen Bee!
My thought is - yay! I like it!
We don't have that now but we are looking at options for enhancing the faves feature in general.
However, you can sort by number of views....
Go to the gallery page. Click Member Galleries. When that loads, sort by # of views highest to lowest and that will show you the galleries with the highest views.
That's as close as I can get right now. Thank you for an awesome suggestion!