It's hard to believe that I've been traveling to Europe for 53 years--after attending college in Austria one summer. We've been to all the major European and Scandanavian cities numerous times--except Lisbon which we've never been to. I never thought I'd get tired of visiting big, busy cities, but future trips will be to smaller and less expensive cities.
We used to travel as far and fast as we could make it in a rental car. But very expensive gasoline cured us of that--and we discovered traveling slower and better. If you think many future trips to Europe are in your future, we suggest you travel to a central location and take day trips or work a smaller region.
If you're just beginning to see Europe, I suggest visiting London and Paris. If you have 3 weeks to spend, take a fast train to Barcelona or a train up to Amsterdam. And Italy seems to be everyone's favorite country to travel to. My granddaughter loves the food there.
I also like visiting Munich, Bavaria, Tirol district of Austria and Salzburg. Munich, Salzburg and Vienna are also great for one trip. Our new favorite city is Budapest, and we also suggest taking in Bratislava and Vienna on one trip. We were late visiting inland Spain, but we loved our trip to Madrid, Grenada and flying over to Barcelona before taking the fast train to Paris. Other than Barcelona, we don't care a thing about visiting the Mediterranean coast of Spain.
My wife is now having mobility problems, but we've been traveling with a personal power scooter without incident. We met our match in Venice last Summer with the arch bridges, but my granddaughter has now seen the city walking with me--my 10th+ trip there. We've been taking a week on the ground and a week on a cruise ship in the Mediterranean the last 3 years.
When we've had the time, we've taken two Spring repositioning trips from the U.S. to Italy and one trip into Southampton. The cruise ship is a very good way to visit new countries, and the prices are often cheaper than visiting on the ground--especially in very expensive countries like in Scandinavia.
Happy travels!