The <i>Leonov</i> design from the movie had a tremendous effect on my conception of deep-space transport growing up, particularly the centrifuge. I still think that, given (major) propulsion improvements, the design would be good for short space jaunts from a a few days to a few months.<br /><br /><i>Discovery</i> has always interested me as well, because that's a ship that we could conceivably build within a generation; it's basically just a crew module with a long series of fuel tanks separating it from the propulsion unit. Of course, I think the centrifuge would be too small to be workable without nausea and other upset for the crew, and the pod bay technology is some ways away, IMO. The meat-and-potatoes of the ship design, though, seems quite workable.