I like all the ships honestly. I do wish that knight/consular and inquisitor/warrior got different ships but they both look good.
Agent - Definitely the cleanest, sleekest ship to look at. Inside is nothing special.
Smuggler - Feels like the largest when you look at it or run around it. The trip from cockpit to ship exit feels like a jog though.
Knight/Consular - I love the huge engines, and the interior is compact but easy to move around (Might be the shortest trip from cockpit, dive over railing, ship exit)
Warrior/Inquisitor - Love the look, just feels right for the class. Inside feels kinda cramped, but that's just to keep your Sith angry and full of hatred. "Blast this cockpit is too small. I shall save this anger and unleash it on my next foe."
Trooper - Not much to look at it, but the interior just suggests function. Storage room, armory, med bay, bunk room, war room. It feels right to me.
BH - What a cool design! It may look like a beat up old ship, but I love the engines that drop down. Outside of the entrance, it doesn't remind me of Slave I. Slave I was essentially resting on it's back. The inside also suggests function with the holding area, and armory/storage at the back of the ship.