Well, I'm partial to the SR-2 Normandy. It's the best frigate the alliance navy has and the first human aircraft that uses Turian ship design. Not to mention it has a lot of cannons to calibrate. You know, the good stuff in a ship. Stealth, speed, cannons, and a Garrus.
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All of the Elder Scrolls spaceships. THEY HAVE GIGANTIC FLYING MOTHS!