You didn't say where your Rick Steves Tour is, so I'll just tell you how I plan a trip to France. I've traveled to France at least 11 times since 2000, and going again in a month. I combine travel in areas of France, so I do not need to get on or off trains a lot or drive long distances. I also think about future trips I would like to take in countries that border France. In 2014, we traveled to Bordeaux and Toulouse, then did a week in Barcelona and the Priorat area, for example.
Thus said, I have been to Bordeaux 3 times and enjoyed it, especially the last trip as Bordeaux has really matured into a comfortable, easy city to negotiate and environs to travel. Increased consideration for travelers - good restaurants, chocolate shops, pedestrian shopping area and tram completion not to mention an interesting history make Bordeaux a good choice to visit. In 2005, it was difficult to find a truly decent hotel within our mid-range pricing. In 2014, there was a lot more to choose from a bit further out from the center, and we decided to stay in a B&B. With a car, you can visit charming St Emilion, Arcachon, the Medoc or Sauterne area.
With a train, I would include Toulouse and Carcassone, or travel to Spain.
That said, Alsace is very unique especially the Route des Vins.
