Honestly, as an adult, I appreciate anything I get now LOL beacuse I don't normally get things. I never appreciated those burger king gift certificates as a kid or the 20 dollar gift cards to certain stores, I had always wished it was just cash. Now i'm like man, i'd love someone forever if they gave me a barnes and noble or subway gift card
I agree though, getting something you already have, especially if it's a book or movie, kinda sucks.
Hmm..though I usually try to appreciate anything people get me, sometimes it's pretty hard to feign gratitude. I used to hate those crappy puzzles and wooden bowling games. They almost always ended up getting shoved to the back of the closet and never being seen again.
That's one reason why I love the Amazon wish list. Now when my mom asks what I would like, I just send her the link.