Man, central Rome is thoroughly awesome. It seems like there’s something fascinating hidden in every street, be it a ruin, a huge basilica, a fountain or sweet alfresco dining. The sights we queued for weren’t as interesting as the ones we found serendipitously.
Rome is easy to get around. Most sights are within walking distance. My guidebook says the metro isn’t worth bothering with, but it’s wrong, wrong, wrong. If there’s a metro stop near where you need to go, it works extremely well. Far easier than trying to figure out how the buses work.