if you have not tried a palm nailer you really should if you do any kind of construction nailing
you can drive nails in ways that you could never do by hand
if you need to drive at an angle to reach material it works like magic
it is really good in cases where you cannot miss the nail and leave marks on the material
once you get used to this tool you will leave no marks at all
it makes vertical siding easy
not sure if it can be adjusted for drywall nails but it might work
it also makes jobs that require two people to be done with one person