I am a reasonably contented person so I do not think my life would change that much.
For one thing, I am already without a job other than taking care of my children so it is not as if I could quit my job. If I were teaching full time, I think I would not like to quit completely because I found teaching to be a pretty fulfilling line of work. I think that I would try to cut down to part-time work.
Other than that, I have no big dreams. I might like to spend a couple months in Japan trying to immerse myself in the language and finally get fluent (I get by but am not fluent and I would like to be). But I couldn't do that until my kids are older anyway.
This is one way that I think I know I'm happy -- there are not a lot of changes I'd make if I had a lot of money.