There are too many places I'd like to visit, but here's a few:
New York City
Return to Italy, Ireland and Scotland and see more of them
hmm...I really liked Edinburgh. When I was there I wrote down that I wanted to go back and live there for at least 6 months. I would consider Vancouver, BC, as well. I enjoyed my time out of the States when I was gone for 13 months, but I was excited to be back, I feel at home here.
My other option besides Portland was Philadelphia and I wouldn't mind living there. I really love the architecture there and I LOVE the pretzel place that sells fresh pretzels for about $0.40/a piece at midnight...