My husband is newly/not so newly on a kick of "FIRE" (financially independent, retire early). I think it's an offshoot of Dave Ramsey-ish behavior. Basically building a big enough nest egg that one can live off the returns and never touch the principal. He has been reading books, listening to podcasts, going on forums, etc.
By his estimates, we may be able to achieve this in 10-15 years, working hard and saving aggressively. We have 10 years left on our mortgage so that would be paid off, and we have saved a lot for college. We are 40-42 years old. Since our kids are 5 and 8, this would also occur around the time of the kids going off to college/empty nest time.
But I don't think that my husband actually wants to retire! I really can imagine him working as long as possible. He has never NOT worked since he got his first job in high school. His identity is really attached to his job. He doesn't have any real hobbies and has never seemed interested in picking any up. I'm pretty confident he would be miserable as a 50 year old retired person (and FWIW he doesn't disagree).
On the other hand, I don't have a problem filling my time while I'm not working. I definitely feel like I could work LESS, but I know I would have a hard time with complete retirement. I also have the suspicion that I won't mind working as much once the kids leave the house. Those 6 pm meetings that I hate so much because it means planning dinner ahead of time and rushing home to get there before bedtime wouldn't be such a big deal (and my colleagues who are empty nesters seem to confirm this, as they are the ones always scheduling them!) But I could be wrong and I could love having the ability to walk away from my job when I hit 55.
At what age do you plan to retire? Would you retire early if you could? How do you/will you feel about work once the kids leave home?