I love all of you and am so glad there are others that understand and share similar experiences!
I have been exploring this concept a lot lately, especially as I am building my skills as a visual artist. My "imagination" is there, but not the way others describe. I can compose things and make ideas, and when I read a story there are vague washes of concepts that could maybe be considered "seeing" in my head, but I don't actually have any control of it and when I think about it the images aren't really visual at all. Like I can't event visualize an apple if I closed my eyes all day and strained. I do however on occasion when meditating or deeply relaxed definitely "see" swirling rotating colours in a void of space.