I can't side with the Templars - EVER
I can't kick Sera out no matter how naughty she is. 
I can't give Blackwall any other conclusion other than letting him join the Wardens.
I can't let anyone except Leliana be the new Divine. (I was open to Cass but I feel her energy is better spent rounding up and fixing the Seekers)
I can't let anyone but the Dalish Inquisitor ride the Harts
I can't ever desecrate the Dalish graveyard, which means I have never been inside that tomb (in over 30 runs of DAI)
I can't let the Chantry have the documents recovered at The Knights Tomb.
I can't ever betray or side against Briala.
I can't ever let the Chargers die.
I can't ever harm the Golden Halla.
I can't ever let Hawke die. (In my canon world its always Stroud)
If I am playing a Dalish I can't let Morrigan drink from the well.
I can't ever kill the great bear and her cubs, nor purposely harm any Halla.
I can't ever not flirt with Scout Harding
I can't ever make Cole more human.