I rarely use the Street Bob to go into Rome: I use my Honda SH 150 for that.
Every Country as its scenic roads and, in the end, can provide enjoyment to the riders.
I don't envy USA (for many reasons...) but I admit that there are some great roads to ride there. There are also many boring ones.
In Europe we have a great variety of roads, good ad boring and, most of all, wonderful cities.
Yes, some can look scary to drivers used to drive in the desert or in 5 lanes straight roads, but if well approached.... the experience they provide is great!
I think that this kind of views (Emperor Augustus' Palace just over the Circus Maximus) is priceless... despite the "tightness" of the city!
:s
Ciao
Ugo