Random Profile Suggestion

I don't have rank 5 mastery on anyone. (I don't play enough). BUT if possible, would it be a good idea for Riot to let us choose what 3 champions are displayed on our profiles? Like, if you have 20 max rank champions, you would let us choose which 3 and which 10 we like the most? I understand that points decide it, but once you hit 5, there's not really anything else. So once we've "mastered" champs, why not let us display which we're most proud of?

I'm not sure if this is a good idea or not, but I just kinda thought about it. Thoughts?