First off, has to be Slave I. In the old movies, you never saw it in action, but I always imagined it could be pretty lethal.
Secondly, it'd have to be serenity from firefly. I've never wanted to be a part of a crew on a spaceship more!
Then, after playing a helluva lot of hours on the Halo video game series, I'd have to say the pelican. It was only in more recent games you actually got to fly one instead of just being a passenger.
Then it would be the Dalek ships in doctor who. I love the classic 50s style saucer shape to them.
lastly, it would be the ship from the 80s film, flight of the navigator. I loved that film as a kid, and was always jealous I couldn't have a spaceship like the kid in it.