I also pull the King of Pentacles a lot when I’m reading for a specific person in love spreads.
Usually court cards don’t have to be people, but here I read the King of Pentacles as an actual person.
Look at the Rider-Waite — he’s got a hidden skeleton under his foot. So even though he looks solid, successful and confident, there can be something he’s not showing or a side of the story that’s kept quiet.
Not saying every King of Pentacles is sneaky, but they do tend to hold things back.
Hope that gives you something to chew on.