The other category are achievements that are just brutal to complete on one character (and you’d never want to do for multiples), such as 2500 daily quests or 250K honorable kills. In these cases, the cumulative work of all your characters on those criteria will count.
En gros si ta 100K VH sur un perso et 150K VH sur un autre, t'aura le titre XXX, Le Sanguinaire (250K VH)
A MWA LE TITRE §§!!!o111oneoneone
(dedicace a Loic)