I must say that I had thought about this, but never seen anyone else mention it. Sasha Volokh writes about a Washington Monthly article that shows acceptance of a Gay community is a direct indicator of the attractiveness of that place as a place for knowledge workers to live.

My wife and I find all of the cities in this post to be on our short list of places we have lived and are willing to live again - ignoring that there are some Canadian cities on our list that weren't considered here.