Now I know this is implicit to every place we go in the world, but being in Dubai was a different level of people watching.  Only 30% of the population are native to the UAE, which means 2/3's are from everywhere else in the world -- it was insane seeing soooooo many different people.  Also, I was constantly in awe of the clash of the modern world with traditional Arabic culture -- still can't get over seeing men in traditional gard, hanging out at McDonalds and smoking cigarettes.