We should have a champion favorite marking button.
In ranked, we want to pick our aces. If we added a favorite button, it would act like a filter. You don't have to mark the champion you want to play in ranked to play it, but it would be nice, so people can narrow down their choices to the certain champions they want to play, instead of being overwhelmed with all 126 champions (Is it 126? I didn't count.)
Edit- We could go further and favorite champions based on role. For example, Jungle Favorites would be
, and Top Favorites could be
.