Anonymous wrote:OP here:
I'm glad language wouldn't be a big deal in Italy.
As far as what I'd like to do...I want to visit a lot of historic places. I want to be able to get amazing pictures, and I want to experience different culture. I just want to see things I haven't seen before.
I also love good food!
Rome then

(i am one of the PPs who loves Rome)
I would advise against trying to do too many cities in one week. You don't want to rush and just check off sites on a list. You want to relax, savor, explore, it sounds like. Choose one place and plan for another trip in The future when you can see one of the other places on your list and do it equally well. Plus it's not just a 2 hour flight , it's the couple of hours getting to the airport, etc.
the light in Italy is much nicer for photos than London, I think. Either Rome or Venice will have photo ops around the corner of ancient or medieval things. Maybe see a couple of movies based in London or Venice or Rome to help you decide.