I've finished up my first iOS 5 app (and only third iOS app overall) and I'm wondering if anyone out there has any recommendations for adding that touch of class, polish, professionalism, etc. to a plain-vanilla iOS app. I've taken a look at an iOS 5 appearance tutorial but I don't find it extremely helpful. What do you do to add polish to your UI? For example, do you add a logo view in your UINavigationBar? Do you create custom UIKit control backgrounds/images? Do you remove rounded edges from controls? I would especially appreciate any input related to how you use the new Appearance options in iOS 5 to accomplish your UIX goals.
For inspiration, look at the apps featured by Apple in the App store. Maybe hire an artist or designer familiar with iOS devices and their users (if you are not one yourself). There seem to be lots of creative ways to potentially "delight" the user, customize things for your specific app's purpose or customer base, but still stay within the spirit of the HIG.