You got those Club Tags next to your name, but imagine a full set of quests that you can accomplish to get certain titles by your name instead
For farming super well, for playing lots of games, for reaching 1 million mastery, even for owning a PBE account. The varieties should be large with a game like this, and it would just add another flavor and dynamic to the game probably.
For example if I have highest ward score in the past 10 games I get a title "The Warder" xd
Then I can choose which title I want to display next to me.