[AlecSchueler]

I can visualise arbitrary things in my mind, same with sounds, I can build up quite a decent level of polyphonic music and have it play in my head.

Certain things I visualise as a matter of course, I give them colours and shapes etc., and in those things I do well at reasoning. But then I hear other people talk about how they visualise things like arithmetic and I notice they're much faster than me, I think because I'm not just "seeing" it, I have to actively "calculate" it.