Poor Photo Handling
I use an iPad 2. If you take a screen shot in the landscape mode, it will appear at 90 degrees rotation to either orientation when viewed in the Photos app. I have rotated such pictures using the PSExpress app. That is just lousy programming somewhere.
In a similar vein, none of the pictures on my iPad retained their file names. When multiple pics are mailed out they ALL go as image.jpeg (yes, 4 letter suffix). That makes the whole device pretty much useless as a graphics interchange platform. That can't just be naive programming. I consider it a deliberate dumbing down.