You try to care about Rey as her story could be very interesting.....but in both movies you never really know what her story is or what her journey is.
Finn's story could be interesting....but in both movies he just wants to run away then something stupid keeps him around...then in the end his story is nothing. They should have done more with the Phantasma angle.
As for Poe....he is a pilot with a cute droid.....nothing else. He could have been the Han Solo of the new trilogy.....but they never gave him much of anything to do.