The bottom line is I'm willing to throw at least $50 into any RPG Obsidian funds this way. It's just too cool to have this kind of direct input into what games get made and I want to support doing it this way. I also trust you guys to make a good game, whether you listen to suggestions in this thread or not.
Things that I'd like to see:
* A turn-based or at least pausable battle system. Make me think a little bit.
* A unique setting
* Strong story and characters
Things that aren't so important to me:
* Graphics - pretty graphics are nice, but I'm willing to sacrifice them for other things
* Voice acting - again, nice to have, but something I'm willing to forego
* Licensed setting/characters - unnecessary and too expensive