We're not talking about what you want in the next OS, or the next piece of hardware, but what you like best about what you have in your hot little hands right now.
I like the weight and solid feel to my iPhone. It doesn't feel cheap or plastic, and there's no question that I have something special in my hands.
I like the size of my iPad mini - it's what the iPad should have been from the start. I can hold it to read for hours, and don't need to use both hands.