All the damn time.
Normally the ones where I’m close to waking up so things are eerily realistic enough for me to think it’s actually happening, but at the same time it’s still a dream so weird stuff is going on.
This can range from interesting stuff to mundane stuff like one time I dreamed my sister came over cuz I swore I heard her voice. So when my mom woke me up the first thing I asked was if my sister had brought her puppy over. My mom had no idea what I was talking about. Or this other time I dreamed my cousin had come over for a visit and I was so convinced of it that I rolled out of bed thinking “I need to get up and not waste any time of his visit”. Then I stood upright and remembered he wasn’t there at all, got disappointed, went back to bed.
Also I’m Narcoleptic so my REM sleep is all jacked up, but it occasionally is useful for remembering dreams more clearly. Down side is you can also get hallucinations upon going to sleep or upon waking up, often with sleep paralysis with it. And what you see is always scary. In my case it’s bugs. But if I wanted to I could use the horrible images that I repress, I just can’t do it horrifying justice with my art.