I would like to suggest adding role-specific achievements/titles.

I am using the Inquisitor role as an example, but any role would apply:

While playing Inquisitor (i.e.more points in inquisitor than the other two trees), specific achievement objectives must be met. Upon completion of said achievements while in inquisitor, you are bestowed the title "the Inquisitor" or a prefix title "Master Inquisitor" (for all inquisitor achievements completed).

Each achievement's objectives would need to be role specific (tank, support, heal, dps) but could encompass a wide range of open world and instanced activities.

I would love for my cleric to be "Master Inquisitor Jaliah " or "Jaliah the Defiler", etc., etc.

Could be fun!