Here are the reasons for my choices.
SS/TSMV Queen Elizabeth 2 is a beautiful ship, she was fast and extremely well engineered. She has an amazing history and at the time she must have been a very different and thoroughly modern ship.
RMS Queen Elizabeth (Lizzie) & RMS Queen Mary The two sisters were magnificant ships. At the time the fastest and biggest passenger ships ever built if I am correct. I prefer QE or QM just because for some reason which I do not know, I prefer the two funnels, and the slightly diifferent bow shape (not really very noticeable).
SS Rotterdam Well, just look at her. What a beautiful ship - her bridge in particular.
SS United States The fastest ship to cross the Atlantic and must have been very beautiful back in her heyday.
RMS Queen Mary 2 She is a brilliant piece of engineering and I hope she lives the long special life that our QE2 lived.
RMS Titanic/Olympic I say RMS Titanic but I actually prefer the Olympic. Olympic and Titanic were beautiful ships and I loved the architecture inside. The Olympic had a nice long life and has some interesting history.
SS Eugenio C She was quite fast, and I really liked her stern and her twin funnels (they almost remind me of SS Rotterdams).
Vistafjord/Saga Ruby & Sagafjord/Saga Rose They were both very nice ships and I really liked the interiors. They were 'Mini QE2s'.
SS France/Norway The QE2's rival once upon a time. I always liked her shape and those funnels were amazing. Surely that's where Carnival took their funnel design from? It's a shame that she was changed when she became the Norway.
Thanks for reading. Took me quite a while to think of how to write this up. - Adam