I think it would be really cool if I could specify some packages to import by default upon creating a new project. For instance, whenever I create a new project I always import Script Inspector. It would save the hassle of opening the Asset Store, searching for it, and importing it.
Great! As I'm sure you already know, Unity Hub has an "Add Asset Package" button that lets you do this (almost). All that is needed is the ability to set defaults for this area/menu, and that should do it. Maybe it could just remember what you set last time you created a project.
Actually we're reworking project creation in v2 and this may come in the form of an "Advanced Settings" menu. Stay tuned.