Favorite Champion list in Champion Selection

I'm not sure if this idea has popped up in the forums before, but I've found it sometimes difficult to find the champions I actually like to play. Since most people buy champions when they can, they don't actually play them all, and I feel it would be a good extension to the champion selection to add a Favorites list. Similar to the Item Set, it would make champion selection easier for players that fill to make last minute choices.