Chocolate Pi, what an interesting question. When I learned about synesthesia in my neuropsychology classes the first thing that popped into my mind is how cylindrical Carlos Santana's guitar sounds to me, and it has the color of nickel or pewter. The higher the note, the lesser the diameter of the "pipe" and the shinier it gets. Also, the months of the year, when I visualize the calendar, are in the shape of a "D" with January beginning at the top and the rest of the months arcing down towards the bottom. On New Year's Eve, in that one instant at midnight, it suddenly springs up again to the top of the D. The brain is so amazing. (Not usually mine, but I mean, in general) heheheeee I can't wait to hear other people's contributions.