You guys hate each other lets be real. iPhone the elegant, aesthetic Apple lovers dream. Symbolic of hipsters, rebels and the right brained creative individuals. Android, the diverse and efficient platform for hackers, nerds and the left brain analysts. Which do you prefer and why, looking forward to some great comments and opinions.
Just for some actual context on usage of each, check out this article. It would seem that Android is outselling Apple in smartphone but losing badly in the tablet market due to the success of the iPad. Apple is making more money though so it depends how you define success. Whatever type of app you make, ensure that the UI is great to keep your users.