This is very interesting!
I just realized that when I imagine things they are rather sketchy. For example, when I imaging a beach, it is very abstract. When I try to describe what present on it, I do not use an object from the picture, I first remember what could present on the beach like a left towel and then sort-of add it to the mental image.
In school I also had troubles with drawing. I could draw regular shapes like cubes, spheres or beams, but drawing an animal was a nightmare.
A probably related thing is that I do not get why people drink. I do it occasionally for a social aspect, but I do not remember that I ever experienced being more relaxed from it or having any special fun. I just feel more and more intoxicated :(