My memory seems about average. I learn and remember best by doing the thing. If I've done something a few times then it's easy to remember, feels like it gets put in a permanent storage place in my brain. I can remember visual details of things if I put purposeful effort into it. The details are kept in a list of attributes like "Red shirt, short sleeves, fits loose" and such. I do have trouble recognizing people, it's not face blindness... it's just hard to remember someone unelss we had a particularly interesting conversation or dance (I go tango dancing a lot) or they happen to have a really really unique appearence that's easy to log in words in my head. Remembering first person events in my life tends to take the shape of words spoken + words describing the event, what I was feeling emotionally (if anything), and sometimes physical memory (I have a physical sense in my memory/imagination instead of visual, so not full aphantasia)
I have very visual dreams. I get a little obsessed with them b/c they're the only visual imagery I can get. That's awesome you can get the hypnagogic imagery to chase! I want to work on that, but not sure it's possible. I sometimes have non visual versions where I'm following a storyline/scene, but it's all non visual, and then I wake up from the half asleep state. My dreams are usually very divorced from reality, I'm almost never myself, and sometimes I'm a cat, gargoyle, octopus, etc. Fighting is pretty common, as well as post apocalyptic settings. Dreamscapes themselves are visually crisp and detailed. I really want to learn how to lucid dream, then I can use my dreams as nighttime visual imagination land ^_^ What are you hypnagogic hallucinations like? Do they have a mind of their own or are they similar to lucid dreaming in that you have some control?
Partial aphantasia I have a physical imagination, like having a hundred tiny hands touching a thing. Or I can imagine what it feels like to be a cat, or a palm tree blowing in the wind. I can imagine my voice in my head, but no other sounds. No visuals, tastes, or smells.
Depends on why you have aphantasia. Some people are born with it. Some people get it through injury. And some people develop it through trauma. I think trauma induced aphantasia could be reversed. My therapist thinks it's likely as well. If one can address the trauma that triggered it, the aphantasia will probably go away as well. Sadly the trauma that caused mine is from a really early age, I'm not sure I can even access those old memories enough to really bring them to full closure. I had a visual imagination when I was very young, but since it only showed me horrifying imagery, my brain eventually shut it off. I bet physical head/brain injury type aphantasia can be fixed too... but that'll probably take a LOT more research to start to address.