Yes, but actually because of past job instability. I got laid off during the recession, less than a year after I graduated school. I don't want to have that feeling again, of not knowing when I'd find another job, any job, any location. Having to move back in with family. (Okay, I didn't have to move in with my parents, but my parents are awesome and it was the financially prudent move. And yes, rent was paid, chores were done.) Not only was I competing with all the other people who were let go, usually with more experience than I, but also all the new grads who had the advantages of the on-campus recruiting. I remember so many of the entry level jobs were asking for something ridiculous like 5 years experience.
I started a new job about 6 months ago, and I think I'm okay, but who knows. I guess I feel like I could get let go of at any time, even though I've been assured you really have to f-it up to get fired. I want to get to the position of FI as fast as possible, so that if I have to get by at a bare-bones level, I can. Some events can leave lasting impressions.