The really interesting thing is how little the windfall of money actually affected my day to day. I still drive the same car, and live in a normal sized home. I guess the difference is that I have zero debt, and a substantial sum of money in an investment account that I am not sure what I will do with. I work at a different company now, and still do the normal 9-5, even though I could take years off work if I wanted to.
I am really happy in life, and I don't attribute it to the money at all. I find it really difficult to explain how your life view changes. The most interesting thing I have observed is that once you have "enough" money, any more than that can just be a burden. What do I do with all this? Why am I paying more in taxes than I used to make? My best advice is to work towards making enough, where you aren't worried about money and are comfortable, and then pursue things that make you happy in life, because a few million won't be it.