I like it and think it's a nice "interactive" break when you want some down time from attractions.
At DCA, they don't take a poll. There's a board posted outside listing what characters will be drawn at what time:
10:00am - donald, 11:00 am - pooh, 12:00pm - mickey, etc.
I actually like this method, because I usually decided whether to do it, based on what character is being drawn.