A pool just ended on French Wikipedia, about Notifications. The main question was : do you like Notifications?
96,92% say yes! (And no one was against :-)
The favorite feature is the username notification. To notify someone is now very common.
We also try to see which future options are expected. The favorites ones are cross-wiki notifications & notifications when a page they created is under a deletion request
More details, in French: https://fr.wikipedia.org/wiki/Wikip%C3%A9dia:Sondage/Avis_sur_Notifications
All the best