I think the extra 12 years at SSR is a HUGE factor for some people, but for others...there is other, overriding factors.
SSR (although, I'm SURE it is beautiful), doesn't have the same appeal to me as some of the other resorts. Since it is by far the largest resort, getting into SSR will be relatively easy to do. If you do not have the "home" advantage for VWL or BCV...they may become VERY difficult to get into (as well as standard or BW view rooms at BWV).
With children...it is VERY important to me "which" resort we stay at. I am an obsessive planner, and bought at both of my home resorts so that I can guarantee getting into them at certain, very busy DVC times. As an SSR owner...I could not do this. Also, I bought fewer BWV points than I would've had to purchase at SSR because I knew I could call day-by-day at the 11 month window and have a pretty good chance of snagging standard view rooms at BWV, at a 30% savings in cost....which seems to me to make those points more valuable.
Although, I don't own at OKW, I really envy those who own there...their point system is SOOOO cheap (and yes, the rooms are sooo big!!!), they can REALLY stretch their points there (and buy fewer of them).
I also figured in that the REAL cost of DVC is in the maintenance fees...you really spend a lot more there than on your purchase price...and, those fees can get real pricey if you don't love where you own. Who knows what is going to happen in 38 years...maybe DVC will decide to offer extensions of years to its "owners" who want to buy...maybe they will just "re-issue" points to a new generation of owners...maybe Disney will be wonderful, and maybe it will be "passe"....and maybe a big hurricane will just come and wash up the whole state of FL (something I am NOT hoping...but, with what is happening now...who KNOWS!!).
The only thing I really know is this....my DD will only be TWO right now!!!! And, in 16 years she will be grown and gone (okay...maybe gone

), then I will still have 20 more years to enjoy this contract and hopefully use it some with grandkids. Beyond that...who knows?!!! But, I would rather have 38 years of the "home" advantage to "ensure" that I get VWL every other Christmas, and BWV standard views when I can...because that is truly where I want to stay (and, hope I can get OKW some as well). For me, the difference in owning where you have "dreamed" of, and owning "where DVC is selling at the time" makes 38 years seem truly magical!!!
Now...if DVC offers a 50 year "CRV"....I'm ALL over that one!!!!
Beca