I like Jmacavali's photo the best. But then again, I love small (and big) waterfalls. I wasn't able to vote though because the poll is closed which kind of sucks.
The poll is just closed because it's used in a period of about 2 weeks to decide the winner and therefore who picks the next topic - when the next voting thread comes around for this theme (toys) it'll be stickied and you'll be able to cast your vote then if you wish!