Ok this is waaay too hard so I'll throw my favourite five (lol unintentional BSG affiliation
)
the order is pretty random so :
1. Constitution refit class (do I really have to say WHY ;) )
2. Battlestar Galactica (Reinvisioned BSG is just tough ugly ship... I love that design)
3. Millenium Falcon (that would be my personal ship)
4. SeaQuest DSV (I just love that boat)
5. Conestoga class (Alien's - USS Sulaco... I like Pulse Rifle ... this is like a big flying Pulse Rifle
)