I'd take 150 BUT ONLY assuming that my lifestyle choices of diet, exercise, attitude and social support can also continue. Extreme longevity inevitably means loss of friends, so those who don't come with you leave you feeling bereft. Forever? NOT ON YOUR LIFE, Robert. Not even. I appreciate the chance to do a lot more work on the self, explore more, but only if I am still in excellent health. The issue always comes down to quality of time. Screw longevity if it's just that many more years of lying in bed with tubes. NOPE.