Obviously, I have a tendency to overthink this... I imagine that I'll be putting mine on the heel somewhere. But where? Mine's a bolt-on ES type. Sort of like some the old Japanese Epiphones or a Fender Coronado. On my Coronado guitar it's here...
...I've seen them that way on an Ibanez or two as well.
I have seen this a lot on bolt on LP/SG guitars...
...although this seems to be on a Stratosomethingorother. I have also seen it like this...
...this last one would be relatively easy on mine because I used bolts and ferrules rather than a neck plate.
Assuming that it has to be in this area... Advantage to putting it like the Coronado is that leverage is best for the area and when you set the guitar down on it's back it's not resting on the strap button. I have gotten fairly used to this on my Coronado.
The downside is that you need a fairly thin strap end, or it bunches up against the neck. That's not horrible, but it's a disadvantage. Also hard to use some straplocks that have a sort of wide washer.
Using a neck screw puts some tension on that screw, and I have mixed feelings about that. I have seen it written up as a disadvantage, but it's not that different from the way a lot of strap extenders work, including the kind I have used with my G&L ASAT bass for a decade without problems.
Curious what folks think... I am inclined to go the Coronado route...but still thinking it through...