Initially of course there was a minimum to meet my goals. My target was to be able to live somewhere, cover my cost of living, pay down my debts, and save 10% of my salary in long term savings.
Then as expenses started moving from being "in the future" to being "in the past" I was able to be more flexible on salary.
It helps that I have never equated what I was paid with how much I was "worth." It also helps that I don't have a lot of innate materialism. Although the funny story there is when I went back to Los Angeles to visit my old roommate from college I was showing him a fancy laptop that I had saved up for an bought. He had a pretty crap laptop but had recently bought a nice late model Mercedes Benz. Meanwhile, I had a 10 year old car at that point. We laughed at how the two different areas of California encouraged different status symbols.