I've noticed something about my dreams recently.

Ever since I started preparing for LDs, I have noticed something weird with my dreams. (My preparations include not drinking an hour before bed, getting at least 8hr of sleep, and keeping a dream journal. This journal is what I believe has sparked thisi problem.) My problem is that every time I wake up and start writing my dreams down, they seem incredibly, eerily familiar as if I have been in the dream before. I am also starting to have a break through that I kind of realize I'm dreaming. Is this memory recall a good or bad thing?