I couldn't agree more about the old(er), classic ships. I had the priviledge of sailing on the previous Rotterdam - she was the last steam vessel in HAL's fleet and it was a wonderful experience (smoooooth, no vibration). She was elegant without being glizty (think Marlena vs. Madonna). My travel companions and I were treated to a tour of the engine room by one of the Engineering officers (who was trying to impress the daughter of the other couple).
Cindyeb, stop worrying about it; you will have a marvelous time!