I'll reply with what I have till now, but ya may continue of course
Don't be envious of me being of Romanian citizenship (and Ukrainian nationality). Romania is a black sheep that is 99% of cases considered the country of gypsies, thieves and alcoholics, sharlatans, so everywhere a Romanian steps, they are called a gypsy and looked down upon. Or at least that's if you meet people who base their impressions on stereotypes. Since I am pale-skinned, blonde and have blue eyes, nobody can call me a gypsy by stereotype, so instead eventually they call me a vampire (since I'm from Transylvania). A sexy vampire, that's fine with me. Of course ALL Europe, not only Italy, has stereotypical views about Americans, it's mainly because of how your nation exposed themselves and the country of freedom, infinite possibilities, everlasting happiness and richness, and your media import that we get from you continue to express this fake image. Only people who read selected articles or communicate with actual Americans, or have been in the States themselves, know that this blissful mask America puts on itself is in so, so many cases painfully fake and a large number of people there struggle in life, maybe even much worse than any European country in fact. I guess this is the punishment that comes in time, for America should have really focused on their people and not their power or image in the last century, though I'm sorry it affects nice people like you as well.
Milan is ironically the least Italian place you can go to, the people there are really cold compared to other provinces of Italy, many of my Italian friends (who are not from Milan but went/lived there so they know their stuff) told me to avoid Milan, for I'll go insane, angry and hurt (yes Italians within their own country can't stand each other, depends on regions!).
Venice is a wonderful, wonderful place, if only you take your time (which you sadly didn't have, rushing a travel trip is hell itself, I know too well) and know quite a bit about it beforehand, so that you know where to look and when to be careful. However, Venice also has many places in which gifts or food are astronomically expensive, I am MAD that your guide did such a bad move and made you go to THOSE places. As you know, in this apparently deadly-expensive Venice, there are indeed Venetian residents, living there, paying their taxes, living their life, which means that of course there are enough places which serve good food at decent prices and also shops which won't cost you a kidney. A dear friend of mine lives there (she moved there a year ago though she spend years there before too) and is in love with the city. What you experienced is what shouldn't have happened, bad organization. (I myself want to be a guide as a side-job sometimes, since I have experience with art history, museums, exhibitions and travelling plans and this is why I am angry to hear about this bad experience of a trip. Not angry at you, but angry at the people who should have made your trip a pleasant one. When I was in Florence, I myself made the plan and everything was perfect for all 4 people of different ages and interest levels, schedule full, and my speeches kept their interest through the whole trip.)
Italians are not really fans of rock music, generally speaking. Depends on the person of course, but from the people I know and what they also told me, rock, hard rock, metal, it's just nah, noise, kinda.
Romanians on the other hand can fit in two large categories: commercial pop/club music OR rockers-metalheads. I go with the second one xD
I am surprised to hear positive points of the trip though, I imagined something much, much worse (but well I won't speak too soon)