I think I'd be really nice if we had groups for our notifications. Instead of having to find each contact in a group that we want a notification for, we just change the group.

Example:
I have two main groups with different notification sounds/vibrations/colors. For family and for automated (bank,amazon,etc.)

Instead of having to track down all family members to highlight together and make a change to all of them, I would create a "notification group" and assign them to that group. Then, if I wanted to update the notifications for my family, I would just change the group settings. Also, when I add another contact, I wouldn't have to remember all the overrides I've set. Instead, I just assign them to the group.