Your favourite mode of travel
For me, walking is my mode of travel plus the use of fast travel. In this mode I can enjoy the beautiful environment and explore areas which is not able to access on horseback.
Kaer Morhen should have a chest to store all the loots. As you can fast travel to this location, I don't think it would be a problem for dev to includes this suggestion for their next patch.
For me, the screen loading is when Ciri is down on the ground after some fighting with the Frost King.
I'm using the latest Nvidia driver on my 750Ti video card.