I haven't bought any tickets; I've only bought two lotto tickets in my life actually. My folks bought one each and my mom said something similar to the sentiment on this thread, how difficult it could be to win so much money and who needs that amount of cash? I said, well, think about the amazing change you could make for the world: rebuild schools, pay great teachers a great wage to work in tough places where they're most needed, rehabilitation centers, etc., and since you're so insanely wealthy you can spend as much or as little time you want ensuring these efforts are fulfilled.
And I'd probably buy David Bowie's apartment on Lafayette Street in NYC. Because he lived there, which would be my version of living in a (music) church. And you *know* it's a great apartment and secure enough that "friends" and relatives can't get in without my express approval. Based in NYC, I could attend any music and cultural events I'd want or travel anywhere in the world. Visit at least every capitol city in most countries of the world, tour every great vineyard, see every museum. Music and language lessons.
I'd be a global gypsy and take my closest friends and family along with me for the ride.