We moved to the Bay Area when I got a job at Google a year and a couple of months ago. We really like it in California: my job is super interesting, the weather is nice, and the people are amazing. I cannot imagine any place in the world where I could have a bigger impact being a programmer. However, going back to Europe is a topic of our everyday conversations. Why?
My wife is one of the smartest people I know. She is the webdesigner you would love to work with (you know, those who can actually code their stuff in a way that works with all browsers, use source control, and are not afraid of using the command line). She worked as a project manager and her team loved her. She has interesting things to say about startups, business models, and Goedel's theorem. She used to have a career back in Europe, but in the US she's almost a non-person. She can live here, yes, she can drive a car, but she doesn't even have her own SSN. She cannot do any productive work, and getting an H1 visa if you are not a software engineer is extremely hard (we had this conversation with a couple of immigration lawyers).
I have my dream job, but at the same time I cannot help the feeling that I am ruining my wife's life.