I gotta tell you, I feel like 50 unlocked something in me. I feel more capable, more flexible in my thinking, more idealistic, and more ready to take on new challenges than I had for years before turning 50. (I'm a few years down the road now.)
I realize some of those statements are not what you typically hear, and I know that mental decline is an eventual part of aging no matter what. But I feel on fire in a way I haven't since my early twenties, and I can see the effects of it in my life.
And best of all, my viewpoints have jumped hard left. (Not that they were particularly rightward in the first place.)