I'm lucky with dreams.
I usually dream about things that I have been talking about that day [for example I was talking about meeting up with a friend yesterday and dreamt about meeting him]. At the very least I dream about things VERY recent and relavant to my life. If I go to sleep thinking about someone or something they will CERTAINLY appear in my dream.
I have had and quite often have lucid dreams, I'd love to know what causes them to be honest, I generally don't enjoy knowing I'm dreaming all that much. But I have a slight obsession with my dreams and the events that unfold in them [and the possible "meanings" of them - I mean, a dream HAS to have some meaning, right??].
I think I haven't dreamt about twice in my life, and both times I closed my eyes, opened them, and it was morning. There seemed to be no time delay AT ALL and it actually freaked me out a little bit, didn't like it at all.
My dreams are also usually very long [as in, they SEEM to last at least a day, sometimes longer, even if they do in reality only last a few seconds/minutes] so half of my life and sometimes MORE is spent dreaming. I don't know what I'd do if I couldn't dream anymore, I think that I wouldn't really want to sleep except from utter exhaustion really.