My husband and I took one of the last QE2 transatlantic crossings in April08. He had been once before in the late 1960s. I absolutely loved it. We had a small, basic cabin not too far above the water line, so it was fun to look out our porthole and to hear the waves. Three meals a day, plus late night buffet, afternoon tea and room service. Concerts, movies, lectures, library, pub, casino (we didn't indulge).
I was just mesmerized by walking the deck or sitting in the many public lounge areas watching the waves, the clouds, and the sun. There was a mysterious sort of emotional awe at actually crossing the North Atlantic as my ancestors had done (though not in such luxury).
There is quite a bit of evening formality on the Cunard ships, but that was fun in itself. He took a tux and I took some simple long black skirts and some "glittery" tops. We then spent about a week in England and flew back on British Airways. We used a local travel agent who got a pretty good rate on the return flights thru Cunard.
Now there is the QM2, which makes several TA trips each year, and the Qeen Victoria, which QE2 and QM2 fans tend to look down upon as a "cruise ship" and not a true "ocean liner".
I would do the whole thing again in a minute!