7" - 8".
Decent screen (IPS, AMOLED, I'm not picky on a tablet)
Full size USB (like my Thrive). Full size SDXC (like my Thrive) would be a bonus.
D-pad and 4-6 buttons for games/emulation/etc...really wish someone would make a tablet with even a couple of buttons and a d-pad. Make use of that bezel
There are only a few terrible Chinese Android gadgets like this.