Cruise/Italy/Greece help

Hey girls! We are planning on going on a mediterranean cruise this June. Not our honeymoon, but maybe you all could help anyway!
I was wondering if anyone has been on a med. cruise before and can help me decide which ports I should sign up for the cruise-ship excursions, and which would be easiest/closets enough to sight-see on our own.

Our ports of call:
Departs from Rome (getting there a day early)
Monte Carlo, Monaco
Florence/Pisa (Livorno), Italy
Naples/Capri, Italy
Santorini, Greece
Kusadasi (Ephesus), Turkey
Mykonos, Greece
Athens (Piraeus), Greece
Katakolon (Olympia), Greece
Corfu, Greece
Venice, Italy (Staying there an extra day before we come home)

Julz, we're doing a Mediterranean cruise also & ours goes to Venice, Monte Carlo, Florence, Naples, Croatia, Barcelona, leaving from Rome & Sicily.

You should definitely check this site out there is a wealth of info & you may even find people on YOUR actual cruise, definitely good tips though

FH & I were hesitant to book tours on our own but other people on our cruise from the boards set up their own tours w/ reputable people & we're saving hundreds of dollars & taking the same tours, just with 12 people instead of 75.

The site is

Cruise Critic (& go to BOARDS, then Roll Call or the Europe board)