Just a heads up, it looks like I was only able to vote once, not sure what's wrong.
My main reason for wanting LL/spine lengthening is love. Though I can definitely get by at the height I am (5'7) more height can definitely open more doors. I don't mind dating a woman that is my height or up to 4 or 5 inches taller--but each inch I get puts me above more women, makes me equal to ones I used to be shorter than, and narrows the gap between ones that are still taller than me. Interestingly, the taller women get, the less they care about finding a guy that is substantially taller then them.
Second is business/career. I ultimately wanna start my own business, but right after I finish college I might get a job with the government in either bank regulation or law enforcement. In both of those fields, height gets you instant respect; and the lack of it would require compensation. And compensating can often backfire on you. That's what it comes down to overall; I could be a great guy overall--money, a nice home, a fit body, well read and traveled, but the better a person I try to be as a short guy, the more it looks to some people like I'm just an insecure "manlet" compensating for a deficit. LL is the only way to remove that deficit!