In the last 2 weeks, 2/3 of my vivid dream have involved some kind of collectable card (Pokemon etc.), and even though I don't know why, this could be a good start... thanks for the advice.
The thing in the first link about larger-than-life people is so true! The people in my dreams are always the centre of attention, and are usually about 1-story tall, even though it never seems strange in my dream.