Me and my mate have talked about how we would spend it virtually every day at work that it was being rolled over.
I wouldn't buy more than I need, like 5 cars, that's pointless. Probably just a mansion for me and my family, nice car etc, all the material things I want. Since i'd have so much time on my hands i'd want to learn new skills, e.g. hire people to teach me other languages.
I heard there's a whole island already built up just off the caribbean for 45m, i'd probably buy that, give some money to friends, and then just sit on the interest. I'd visit vegas a few times a year, maybe even get on some episodes of high stakes poker