I'd say that 95.437% of the Joins I do are straight Inner Joins.
So each of those times I have to remember to go down to the Select part of the Join tool and deselect all the fields I joined on the Right Side since they'll be duplicates.
I'd like a checkbox like below (defaulted to CHECKED) to deselect all the joined fields from the right hand side. In the rare cases where there's a need I could uncheck it.
Deselect R join fields