WolfyJames
I also use significators and I let the deck choose it for me, I fan the cards, close my eyes and then pick the cards of the spreads, significator included.
I think this way the card reveals a lot about a person. It can represent a strength that can be good in a negative reading, so I tell the person that while they will go through a hard period, that their strength (qualities from the cards) will help them through it. It can represent a weakness as well, that can alter in a bad way a reading. It can represents a desire that can conflict or ally with whatever their reading is about, so it's a matter of determining if this desire is good or bad (drinking too much or taking drugs are bad desires). And there are other elements as well that come from experience using a significator that way.
I think this way the card reveals a lot about a person. It can represent a strength that can be good in a negative reading, so I tell the person that while they will go through a hard period, that their strength (qualities from the cards) will help them through it. It can represent a weakness as well, that can alter in a bad way a reading. It can represents a desire that can conflict or ally with whatever their reading is about, so it's a matter of determining if this desire is good or bad (drinking too much or taking drugs are bad desires). And there are other elements as well that come from experience using a significator that way.