We didn't really get to see a lot of Palma. we were exhausted after travelling and didn't feel like setting straight out on an adventure on foot! Similarly, there wasn't time to look around on our day of departure. However, it all looked very pretty from the ship!
We loved Corsica! This would be somewhere we would come back to for a longer stay. We took an open top bus tour which went around the main sights of Ajaccio and had English as well as French commentary. It also went further afield to the Sanguine Islands where we stopped for a short time. If you are interested in Napoleon there is lots to see, too. After a walk around the shops, we spent two hours on a beautiful sandy beach and swam in the sea. A wonderful first stop.
The actual port was Livorno and this was something of a disappointment - very busy, not much to see. However we used this as a base to go to Pisa and our rating indicates this. Pisa is wonderful. There are excursions you can book but we were able to get onto a bust trip at half the price - the only down-side being that we only had two hours at Pisa and four would have been better! The whole experience at Pisa was wonderful - beautiful buildings which were quite awe inspiring. We would like to have had time to do some tourist shopping here, too.
Cannes was just as expected - lots of expensive fancy yachts, seafront bistros and a fairly busy but very pleasant, clean beach. we took a walk up to the cathedral and around the red carpet area, spotting the handprints on the pavement. The port looks lovely from the ship too - and many of them don't so it was great to wake up and see the view from our window.
Barcelona itself is huge, hot and impressive. There was probably too much to do and we underestimated the distance between places and ran out of steam before we had done it all. My advice would be to use the public transport - metro or hop/off bus as we really wish we had. Having said that we did get to see the Sagrada Familia which was the most amazing building I have ever visited. It took 45 minutes of queuing to get inside but well worth it so don't give up! We wish we had made it to the Picasso Museum too. Final tip: take the Port Bus for 5 euros - it is a LONG walk just to get to the bottom of Las Ramblas!