I was recently made aware of a youtube series by one of my viewers, titled:
Games Worth Remembering. It's still new, only a few episodes in so far, but thoroughly enjoyable. Each episodes discusses a game which might not be wildly popular, but stands as a high point in gaming's history. So far he has covered
Rez and
Flower, and is currently in the middle of a two-part episode featuring
Ico and Shadow of the Colossus.
If you haven't played one of these games yet, watch the video. If you have, you might still want to just to remember what made these games so wonderful. I really want to go back and play all four of these now.