Well, there's no way on earth I'm getting to $1 mil before retirement, starting as late as I did, so I certainly HOPE it can be done on less than that!
I'm single, and have no plans to be otherwise again in this lifetime. I know plans like that can change, but right now I'm a happy 41yo spinster. :) No kids, and at this point future kids are (both biologically and financially) extremely unlikely.
I expect some form of SS to be around when I retire, though I don't expect it to be "full strength"; however, I'm not planning on SS.
I also expect to be doing some kind of work, and therefore making some kind of income, after I'm financially independent. It's likely to be part-time and in some other field than the one I'm in currently. I spent a year unemployed, and while that's certainly a different emotional experience from retirement, I found that a complete lack of externally imposed regimentation didn't suit me. I need "stuff" to do, and I need people counting on me to do it, in order to be happy. But I do expect I'll find I need only about half as much regimentation as I currently get. :)