I've never had a dream that made any sense.
For instance:
I dreamed that I was playing a RTS, and I was playing against George W Bush. W was whooping my ass and taking over the whole world, but just as I was about to be killed the Wing Gundam burst out of the center of the earth and grabbed Bush. The next thing I remember is seeing the earth spiral downward in a crazy lava-lamp-rainbow-sinewave effect.
Or:
I dreamed that the administrator of a site I regularly visit (not this one) had been incarnated as an evil midget who took over my house. He killed C-3PO but I managed to break his head off with a baseball bat. Then butterflies and shit flew out of his decapitated body and he turned good and decided to live with me.
Those are both actual dreams I had.