Orodruin. Despite the fact that Gollum was a great asset to have on the mission... quest... thing, since they wouldn't have gotten as far without him, he still shadows my mind as an endless threat. Any point in the journey where I could be free of Gollum and still move relatively successfully would be a welcome blessing.
Sam fearing what Gandalf might do to him should he fail Frodo
Faramir being constantly shunned unfairly by Denethor?