I only ever have one of three dreams. My favourite is one that starts off completely 2 dimensional, but then segues to 4 dimensions. I even wake up still being able to properly visualise Klein bottles and hypercubes! Very cool feeling.

Another long term one has me trying to fly off a cliff and falling. I wake up just after splattering on the rocks below. Not sure what that one means.

The other one is not really suitable for repeating on a public forum. Well, not this one