Travel tips/insights to southern Italy (Sicily, Naples, Rome)

Rome is obviously great to see, but I felt Florence was the best to just be in
Rome was like a regular ol city with some amazing historical sites just nestled in
Florence was like Barcelona for me - just wall to wall vibrancy /architecture - food

But riding Vespas in Rome is one of the most exciting things I’ve done with clothes on
;also rode Vespas along Appia Antica to the Sea - that was cool)
Vespas/motorcycles in Rome are insane! I can't imagine how many get knocked down a day. It's a true free for all with limited rules (other than absolutely yield to pedestrians in cross walks). I didn't risk it, but understand your explanation of it very well.