>>13041324dreams within dreams do exist. It is very annoying. There is a sort of feeling to wake up and you can lose it and get trapped. It is parallel to hallucinations within hallucinations. My most distinct memories of this involve waking into a dream where I am late for something. The trick to waking up from multiple dreams is to close your eyes and wait. Time doesn't slow down, except for that folklore where a guy had a lifetime with the machine elves, probably a borrowed story from a trip on DMT. Experimentally, I can confirm that longer time frames boils down to a shitty sleeping experience. LD itself leaves my eyes hurting.
You can develop dream abilities in LD which makes the rest of your dreams level 9. Jumping high and flying are fun, but teleporting is the best. Also, traditional nightmares don't exist. You get twilight states similar to sleep paralysis. Some people really can't stand it.
One /x/ dream I have had is the common aliens invading Earth, apart of some space defense force and the shield is coming down. New agers really try to milk shared emergence of what I am guessing is suggestive story telling. Also, nobody wakes from LD a better human. At the end of the day, LD is bitter cope for lack of imagination. And that can be trained without ruining your life.