Two things about my dreams:
I also experience from time to time that I fully realize, that; this can't be real - it must be a dream, and several times I've somehow 'shaken' myself to awake.
Sometimes I can fly. Actually, in my dreams I always experience the eather as much thicker than air, like a liquid, like under water, which means that it's always very hard to move fast, but it's also very easy to extend my steps to leaps of unnatural lengths, so much that I sometimes manage to go from long-leap running to stretching out into a slowly ascending flight head first. I've also dreamed I stood on an elevated point, remembered that "hm, I can fly, though" and throw myself out into fligh. It's really cool.
I don't remember noticing any of those two things from my youth or childhood, though.
My bad dreams always consist of stress and confusion. Lots of people, more or less known to me, suddenly showing up in my house, making a mess, and getting me upset and frustrated, and nothing I can do to get rid of them. Also dreams of rushing around trying to find something, and the scenario changing all the time so it's impossible to find anything, so again, frustration en masse. This is when I know I've been drinking too much lately.
I can't remember the last time I had a real nightmare. Must have been some high-fever illness in my youth sometime.
(Added: One thing I find really bothersome about the combination of the 'thick, liquid eather' and the stressful frustrated dreams is when I lose my temper and try to hit someone in the face, I can't! My hand and arm moves so slowly thru the 'liquid' that I can't manage to give the bstrds a lip! Grrrr.)
I'll also add that if this sounds funny to most of you - the flying and thick eather etc - I have some neurological conditions that might contribute to my specific experiences: 30 years of epilepsy and some other damages to reflex, movement, balance etc., caused by exposure to solvents in glue and stuff, in my first ten years of work in the advertising biz. ('Paste-up', before 'desktop publishing'.). I also have a vagus nerve implant that sends a small current into my nervous system every few seconds, that no one really knows how it works. It's had me seizure-free for five years though, so jippi!