Must-See Things to Do/See in Europe

I'm starting to narrow down my list of the things I need to do to get ready for Europe. My theory on overplanning and overthinking on the front end is that I'll have that much less to worry about when I get there. Obviously the tour is going to have its own theories on what I will or won't do, but I gathered from my reading the Rick Steves offers at least some time away from "the herd." So: what do I expect to get out of this trip? What do I want to see? What do I want do? I've already nailed down the questions I want to ask myself for my journal:

• What did you see?
• What did you hear?
• What did you smell?
• What did you taste?
• What did you touch?
• What did you do?
• What did you think?
• What did you feel?
• Who did you meet?

Perhaps it's best for me to break things down by destination:

Netherlands/Amsterdam

• Anne Frank House (part of tour)
• Ride in canal boat

Germany/Rhineland

• Ride on river cruise (part of tour)
• Visit at least one Lutheran church/place of historical interest
• Visit a castle (part of tour)
• Buy Hummels for Mom, Col, and Ellie
• Visit World War I / World War II battlefield

Austria

• Hike among the mountains

Venice

• Doge's Palace (part of tour)
• Boat tour (motor, not gondola)
• Seafood
• Go looking for James Bond (kidding)

Florence

• David (yeah, yeah, he's tall and nekkid; can we find some wine now?)
• Walk where Dante Alighieri walked
• Giardino di Boboli
• Find some Tuscan wines and just chill out

Rome

• Roman Forum (part of tour)
• Catacombs
• Vatican City (part of tour)

Cinque Terre

• Hike along the cliffs above the ocean
• Do some serious chilling out
• Find the local wine
• Write
• Don't do a d@mn thing

Switzerland

• More hiking in the mountains
• Find a decent cheese/chocolate, devise plausible excuse to ship several tons to U.S.
• See the Large Hadron Collider?

France

• Tour a vineyard (part of tour)
• Sample whatever wine, food, and wine is available
• Find a vineyard that will ship cases to the U.S.
• Wander Paris (part of tour)
• Musee Rodin
• Versailles (time permitting)
• Chill out somewhere Hemingway chilled out
• At least try the coffee

Other things will come to me. Given a semi-structured tour and that tours are likely to get me to most of this anyway, what things should I do/try/see in my limited free time? Ideas welcome.