Speak for yourself. We save 50% of our income or more, and I bought a couple tickets for myself and threw $2 into the office pool.
Definitely take the lump sum. From what I understand, you cannot will the annuity to family, so if you get hit by a bus on day 1, it was all for naught.
If I won as part of the office pool (a much smaller sum), I'd simply stop my current job and live the rest of my days pretty much as I do now, with a little more travel involved.
If I won the whole enchilada by myself, I'd have to figure out some creative ways to spend the money on various charities and such. I think at most, I'd want a small residence in a few international cities that I would split my time in, and not much else. I'm not much of a "buy things" kind of guy anyway.