While not really all the feasible, it would be awesome if somebody with an interesting life did. There are so many insanely awesome and spontaneous situations that happen in life, most of which never get caught on film because no one is expecting them to happen. I can sure think of a lot of fucking scenes in my life I wish I had on film.
As well as a shit-load-ton of those I would never, ever, want to see again myself. Let alone anyone else. Or rather, everyone else.
Also I like the idea of releasing the whole, unedited, uncensored, raw film after you are long dead. Just the sheer honesty alone would be mind-blowing. Unheard of. Sharing your whole, entire, moment-for-moment life experience with the globe?