I like this design alot. It reminds me of the Gungan Sub from Star Wars The Phantom Menace. (The one they go through the planet in) Me favorite design aspect would have to be the prongs on the tail, they add a nice touch. Also, the way the cockpit is worked into the ship smoothly, not just stuck on there looks good. Come to think of it, this creation reminds me alot of a ship of mine, the HeadHunter. Have you seen it? It would be cool if I inspired you subconsciously.