What I hate is when I dream I'm awake and going through my morning routine (which is not quite the same) - then when the alarm has gone off and I'm in the bathroom about to turn on the tap, I get this wicked sense of deja vu and have to make sure I'm actually awake.

Also, I inevitably dream that I'm going through my morning routine but doing something wrong so then I spend the morning frantically trying to make sure I didn't actually skip my meds or leave the water running.