I (still) don’t see anything when I close my eyes
That’s right, I have no visualization ability.
I wrote a fair amount about it here back in 1999, and nothing really has changed. I’m mostly adding a pointer to it from my blog here because I often get email from people who discovered the page and I don’t have time to reply to it all, so I want people to be able to leave comments or talk to each other about it here.
One person did point me at the work of Stephen Kosslyn, which looks like it might be interesting (I haven’t checked it out myself). His book The Case for Mental Imagery seems like a good place to start.