[jammies]

I don't really think visually at all, it's more sonic, as if words are being spoken in my head without associated pictures. I have to specifically concentrate to "see" memories, and they are never very clear unless there is an olfactory, audible or tactile element to the memory - for example, I can remember hundreds of songs and replay them in my head as if they were "live".

Perhaps not all that co-incidentally, I have a terrible memory for faces and names, and have to repeat someone's name in my head dozens of times when I meet him/her or else I will forget.

As far as seeing different numbers with colours attached, I suggest some sort of electro-shock therapy is in order. We'll zap that crazyness right out of your skull!