Same as zalion0.
The only default profiles I use (and edit) are the profiles to let AP's in the default ap-group come up as AM's. Other than that I tend to never use default profiles.
I do however most often start from those default profiles by cloning/'save as' them.
1) clearer for everyone to give them meaningfull names to profiles wherever possible.
2) customer don't always fully grasp that changing a single profile might change more than just what they are looking at. Also see (1).
3) easier to get back to factory default settings should the need ever arise.