I'm sorry Vassall; the only ports on your itinerary to which I've been are Civitavecchia, which was my point of embarkation and disembarkation; Valetta, which I'm sure I could tell you nothing new about, but was, by the way, my favorite stop on the cruise; and Barcelona.
I did two tours in Barcelona: a walking tour and a "Highlights of . . ." tour; both were wonderful. Barcelona is a beautiful, vibrant, picturesque city--see as much of it as you have time for. Just keep your wits about you; petty thieves are abundant.