I was, relatively, fast at it as well. M.S. was 2 years. Ph.D. was 4 years of research, 3 years of writing. Though I spent the last 2 years of writing ABD working full time for a "startup".
I really enjoyed my time in grad school. I was a computational physicist, doing molecular dynamics. The reason I went into academia was lack of professor positions . The writing was on the wall. So I decided to go the industrial route.
With the impending closure of my latest venture, I am looking around at options, and am actively interviewing. As it turns out, it looks like my thesis advisor is retiring at my alma mater, and they have an open position.
I am thinking deeply as to whether or not I really want to do physics. The pay is terrible, and I am marked as an "undesirable" as I had left academia.
I'll keep looking for my next place. This said, the Ph.D. was a good thing to do. I learned a tremendous amount, not just about a narrow area, but how to compute, measure, and reason about things that are complex.
Seems like this is in demand now. Makes me happy.