I went back to Verona on my way to Venice to see the Arena, which I had missed on my first visit. I had plenty of time in the late afternoon to be wowed by it, then have a walk to Piazza del Erbe at dusk and top the evening off with a lovely dinner. The next day I went to San Zeno (another wow) and the Castelvecchio museum, also impressive, and some more walking around the town which is so picturesque and well-maintained. Before heading to the train station I couldn't resist visiting the (temporary) Corot Exhibition - a bit of the Louvre in Verona.
I can't think why everyone doesn't go to Verona. It is becoming my favorite Italian town.