I want Delaware as a companion. It'd be nice to have someone around for the action again. The first Doctor had Ian, who while he may have been a teacher, did all the heavy lifting in the action department. It'd be nice to have an American as a companion for awhile. And it'd be nice to have someone from a different time period as a companion for awhile. All things the old show did at different times in it's run.
Nowadays I think the odd's of us seeing another Zoe, Jamie, Victoria, Vicki, Leela, etc, are slim to none. I'd like them to start varying up the companions a bit more.
Yeah I'd love to see Delaware again!