I’ve been to all the European ones and they are all pretty cool in different ways. But I would like to try something new so I picked Sydney. Cape Town and Dubai actually do seem interesting but I would not want to spend a whole month there.
Since I've already done Moscow, New York, Tokyo, London, and Paris, I'll go with Sydney. It's so far to travel to, would be neat to spend a month there and travel around Australia.
Dubai is a cool idea, but I feel like most of the time it's just scorching hot there.