The 18th Day called for:
"Your Favorite Color and Why"
My favorite color is Blue.
No I don't know why, I just do.
I don't believe the psychological process behind it - "If you like blue it means you are a..." Oh please I believe in this as much as I do in my horoscope.
If I really had to come up with a reason: I like the feel of denim, which is usually blue.