One thing that is currently causing us problems is the "one size fits all" Notification Scheme's that are in JIRA. Although you can define varying scheme's per project, and using watches people can decide if they want to be notified about a certain issue ... People here want to be able to do similar but at a higher level - be the execption to the scheme's rule.
I set groupA to be notified whenever an issue is created in projectA. This is fine, however [without admin intervention (adding them to groupA or singularly), but with "overriding approval" (eg: 'tick here to allow users to override notifications on this project')] I would like to be able to have a user decide him/herself if they get the notifications for issue creation.
The same applies to all the various issue notification options (eg: issue closing, assigning, work logging etc).
This idea is extensible and leads to create a scalable (overridable) notification scheme which is managed by the end users (if the option is enabled) rather than needing and administration team to get involved in notifications when they should be focused on security and auditing.