Tammy's picture from her Med cruise made me go to the Med last year. I was all set to do the ports on my own but at the last minute my husbands concern on me doing them on my own swayed me to do DCL excursions and they were all wonderful.
VilleFranche did one to Monte Carlo and Eze, (loved it there).
La Spezia I did take the train to Cinque Terre on my own, it was easy and that too was amazing.
Rome, I did the excursion that was on the private train, to the Vatican, Patheon, Trevi Fountain and Colissuem, great tour and taking the train was really nice. Lots of walking, but never really felt rushed.
I also did DCL excursion on the Med last year abd they were Fantastic!
We did 7 of them snd all were great, well worth the cash
Naples, I did a signature tour that was out of this world. Expensive but so worth it, there was only 10 on a small van. First Pompeii, then to Positano where we had lunch, and then off to Capri.