I've started my dream journal a few days ago, and have already noticed some change in my dreams. (See http://www.livejournal.com/users/synbios1/ for details; my online journal, not only for dreams though as you'll see)
Even had my first nightmare in years. If you've ever played Silent Hill 3 on PC or PS2...that's pretty much the dream.

Not some huge monster chasing me rather a psychological terror. Nasty...Anyone else experience such a change?