Open your character configuration. It is under System settings after you press Start.
You want Targeting, and Filters.
Set the Sheathed and Unsheathed filters to the target types you prefer.
Something I have been using that is not default, but after trying, i am liking, is Toggle.
Toggle sets R2 /L2 keys to a toggle mode. Meaning you press it, button options stay Up till you hit R2/L2 again. As a caster is wonderful. When you are fishing is the Best.
Cast,Hook with one finger!