Janfred, I wish I was going with you! I did a Tulip River cruise on AMA, and I've done two Christmas Markets river cruises, one on Uniworld, one on Avalon. I've also done the Yangtze River in China. I've loved everyone of my river cruises and am starting to prefer them to the big ocean cruising. I don't need the big busy ships with the casinos, broadway shows, bingo, comedians, miles of walking and masses of people. If you think you'll miss all that, then a river cruise might seem boring to you. I love the intimacy of the river cruises. I love walking right off the ship in the heart of the towns and cities, and seeing the beautiful architecture and culture of these old cities. It is so peaceful as you sail down the river and see beautiful scenery the whole time. Nightly entertainment is based on local culture or a one piece band playing easy music. Attentive service sharing the ship with only about 138 other people.
The itinerary you are doing is wonderful. Amsterdam is such a great city. I had some of the best hot chocolate ever in a cafe close to the Cologne Cathedral. I felt like a little pea standing on the ground looking up at the Cologne Cathedral. It is so huge. The only building in the city to survive WWII. It is really something else inside. In Rudesheim we did an optional German dinner show that was so much fun. You'll be going through a section of river of about forty miles with castles all along the way.
I just can't say enough about river cruising. I hope you enjoy yours. The Wine Celebration cruise should be really nice. I'm sure they will have lots of local area wine tasting on the cruise. I've been looking at a river cruise for 2013 from Budapest to Bucharest.