I love all the extra books, enjoyed the Lego HP games a lot, and have been playing Hogwarts Mysteries for a while now. FB Cases didn't really hook me.
But my favourite, just from the concept because it won't be out until (presumably) summer is Wizards Unite. Just the thought of an AR game that will immerse us into the HP world and bring things like crazy broomsticks or wild Nifflers to our neighbourhood...I can't wait to try it!!