The measel ball was the best thing that ever happened to televised pool matches. You can easily see the spin put on the ball. (the marbleized balls they tried in the past were the worst)
I play with whatever someone has on their table. The cueball on my table is a blue dot.
My favorite one was on the bar table at the bar on the Reservation south of Tulsa. The thing was so out of round, it looked as if you were putting english on both sides of the cue ball.