I have been using Motorola Droid one and two because of the keyboard. I am writing emails, posts and massive amount of messaging and keyboard is simply superior to virtual keyboard, even with Swype.
I would really cherish a large (4.3 inch), flat phone with a usable slide out keyboard like Motorola Droid2.
I would also love if that device had:
1) keyboard (mentioned)
2) large 4.x screen (mentioned)
3) NFC chip
4) ADK libraries
5) clean Google Android OS, no manufacturer add ons
6) HDMI out