Thoughts on our honeymoon itinerary?

Hello! We'll be taking a ~3-week honeymoon this September (maybe into early October).

A bit about us: We enjoy walkable cities/towns with nice parks/green spaces, beaches, good food, coffee, wine, and cocktails! We prefer going to a nice wine bar or chill bar/lounge over a club.

Right now we're for sure want to go to France and Spain, but are deciding between Italy and Portugal. Here's our rough itinerary:

• Fly into Paris for 4-5 nights (have been here before)

• Take the train to Cassis for 3 nights

If we choose Italy:

• Fly to Milan for 3-4 nights

• Take the train to Bologna for 3-4 nights

• Fly to Barcelona for 3-4 nights (have been before)

• Take the train to Valencia (3-4 nights)

• Fly home (either from Valencia or travel back to Barcelona)

If we choose Portugal:

• Fly from Cassis/Nice to Barcelona

• Take the train to Valencia

• Fly to Libson (4-5 nights, have been before) and likely take a day trip to Cascais.

• Fly home (Southern California)

Also open to other city recommendations! Thanks!