It would be handy to allow a user to select to receive a message when a new ticket (or wiki page or whatever) is created. Then they could elect to Watch This item. If they are not interested, they do nothing.
As it is now, they do get these creation messages. Unfortunately, in order to get these, they also get messages about tickets in which they are not interested. Getting notifications on creation only would allow users fine-grained control over what they get messages about. We have users who want to follow some ticket activity that they did not originate and will not contribute to. The current setup does not allow them to get messages about ticket creation without also getting messages about all other ticket activity.