From the old Nokia phones, I miss that you could navigate the menus by pressing the digits. Frequent destinations, deep in the menus, you'd just know the digits for and could get there quickly. From my Ericsson and Motorola phones, I miss the single-key dialing shortcuts (although, on the Motorola, they were a pain to set up). Hold down one key for a second, and it's dialing a preset.

If only the iPhone had some way of making frequent operations go that fast.