If I didn't want top pay for any of my kids college, I may be able to retire now (47) but it would take a radical lifestyle change. I actually like my work, but I am looking forward to when I don't have to worry about money anymore... it will make work even that much more enjoyable. I have worked with a few people that were close to retirement, and they were loving it. Nothing worried them, nothing stressed them out. That is where I want to get.
Both of the people I know who retired recently died shortly thereafter though, so I don't put all my eggs in the retirement basket. We bought a small place at the beach (paid for) that was a stretch at the time, but it like we get to live part of our retirement now, while we can still enjoy it. If possible, go that route. Don't wait for retirement to do things you think you don't have time for, make time for them now. The two people I know that retired recently, both died shortly thereafter.