I took my SS as soon as I was eligible. I was not going to gamble on a roll of my longevity dice. Turns out, I've already lived longer than I thought I would. But here's the important thing. I am more financially solid than I have ever been in my life, and instead of eating into my savings, I'm saving more than I ever had before. I would have a bigger monthly income had I waited, but the last 25 years since I retired would have been much more difficult.
I feel like I made the right choice, but others may be more satisfied with a few years of self imposed poverty to get the bigger payoff. Mostly, I took the money right away, because I needed it to live like I wanted during those most productive years of early retirement.
But we all have different goals and desires. I would suggest we weigh those actual known variables into our decisions, whereas how long we will live is unknown. The end decisions will still all be different. But the dilemma of "SS, now or later" is one of the most pleasant problems you will face in life. Enjoy it because it only happens once.