I remember dreams nightly, and these days pretty vividly as I'm making more of an effort to recall them and meditate before sleep which I've definitely found to increase both vividness and recall of dreams. I don't ingest cannabis much these days and have definitely found this to suppress my dream recall. I believe dreams definitely can have significance at times. They are a way for the mind to look at issues from a new perspective which can be useful in the cold sober light of day. I've also had a few precognitive dreams, and a few deeply intuitive dreams (one shortly after an ayahuasca experience) where the dream informed me of something that I was yet to confirm in "real" life...I awoke from this dream, and unusually the feeling of this dream did not evaporate and persisted, until I confronted this person about their feelings, and all was confirmed.
I've also had reoccurring dreams in the form of very large tsunami type waves...sometimes I'm looking them in awe from a safe distance, sometimes they are coming to get me. I recall a particularly emotionally turbulent time of my life having two very vivid tsunami dreams within a close proximity to one another...in one dream I was driving a jeep by a sandy beach, and decided to drive out and meet this tsunami head on as it came in, having sucked all the water ou of the bay. I met the wave head on and it hurled me far in land, but I survived. In the other I was by the sea in an urban area and out of nowhere this tsumani appeared, but this time I stood my ground, and when it reached me it was just a trickle of white fizz. I don't really have much faith in dream interpretation, but one hypothesis regarding large waves or lots of water is emotional overload, which does accurately reflect my state of mind at the time. In both dreams I survived he onslaught as well...one time by meeting the issue head on, the other by standing my ground. I had another dream following this stage of my life when I was in a much better mental space, I was by the ocean and it was perfectly flat and calm. I've also had a few dreams and lucid dreams that were converted into brief OBE's which had a very distinct feel to them when compared to "normal" dreams and lucid dreams, but these experiences were brief...the sensations each time were powerful and kinda caught me off guard.
There is some science now linking lucid dreaming frequency with certain traits such as self-reflection, aka metacognition, and that lucid dreamers are a little more mindful in their day to lives, better at spotting discrepancies than non-lucid dreamers (these reality checks of course being one of the main lucid dreaming techniques...it seems like this trait spills over into one's day to day life which is interesting). Lucid dreaming is a definite step up from normal dreaming in some respects, and lucid dreamers do report being able to practice skills in their dream space, and that the benefits of this practice there do spill over into the waking lives.
I've definitely found dreams to have taken on much more psychedelic traits following psychedelic use. I've had a fair bit of dream LSD and ayahuasca...I've found dream LSD to be unreliable but sometimes very effective. I remember one dream, seeing some DMT fractal patterns dancing in the sky, and that acted as a lucidity trigger for me which was cool. Another time, having returned from Peru and experiencing ayahuasca there, I remember waking up one night and seeing dancing geometric patterns in the darkness above me for a few seconds...just to be clear this was NOT a false awakening and I was definitely awake, and the patterns were definitely ayahuasca-esque, and for a brief time they spilled over from my dreaming consciousness into my waking consciousness which I thought was pretty cool!
Liminal dreaming may be of interest to some here...it is using that borderline state between wakefulness and dreaming as a launchpad for deeper explorations into consciousness, also makes a good springboard for lucid dreams apparently.