While MM died before her time (although she may or may not have thought it was her time, depending on what conspiracy theorist you listen to), I can not imagine her being 80 years old. I'm not sure she would have been pleased. I think if she'd been not so self-destructive and taken a bit more care of herself, she would have been a lovely older woman who still had that look in her eyes. Louise Brooks, when she was an older woman, was still incredibly beautiful, even after she'd landed in the gutter and pulled herself out.

But Marilyn's will remain forever beautiful in our minds. And I think she'd be happy it's how we remember her.

I've read a bunch of books & bios of her, and you're right -- regardless of whichever theory surrounding her death, accidental or no, she wasn't "happy" most of the time. She wanted kids, but had miscarriages. She wanted to be a serious actress, but the studios were only interested in dumb blonde roles. She wanted true love, but went through marriages and affairs like water.