I just went through and added myself to some tasks so that I could get comment notifications. (Which I did not know was needed, I thought I would get notifications by default!)
Instead of either doing nothing or sending only me an email that I had been assigned to the task, it sent new task notifications to ALLLL the people assigned to each task. They've already been assigned and have already received those emails, so I essentially just spammed a ton of people on a Saturday evening.
Could you consider letting us start a project and assign tasks/subtasks, then click a button to Notify Client or something so they get only one email that they have been assigned tasks and due dates?
If not, could adding ourselves to tasks/subtasks not send out an email notification to the client?