Notification preferences are currently fairly course-grained. I do not need to receive up-to-the-minute notifications about status changes, description field changes, etc. but I would like to receive instant notifications when I am mentioned (e.g. someone adds a comment that I need to respond to).
Currently, notifications are only either all on or all off. I would love the ability to say "send me all mentions instantaneously and send me all notifications for things I'm watching as a bulk email at EOD" or to even have all mentions called out somehow separately. They get lost in the barrage of daily updates.