Mom said she'll take me to Rome when she's 75 (2013). We went to Amsterdam for a week when she was 65, which was cool.
My parents have spend a lot of time in Italy, and seen just about everything. My brother lived there 4 years, and now he's in his 6th year in England.
I have a daughter who goes to Europe probably a couple of times a year. Her favorite is Paris. She even goes there for cooking classes. I don't enjoy the long plane ride enough to do it that often.
My favorite new thing I saw this time in Rome was the Holy Stairs. We also went to the catacombs. I'm glad I did but I don't care about going back. I like just walking around Rome. We've also been to Venice twice. It's interesting.