Apart from the obvious of helping family out and giving to charities close to my heart. The first thing I would do is buy a decent house, it's not pleasant living in a trailer for as long as I have.
After that I would travel the world, to all the places of great historical and geographical interest (I probably should have been an explorer). I would also make sure I went to all the big sporting occasions I want to see, particularly "The Tour De France". Get a season ticket for Chelsea (believe me you need a lot of money for one of those). Own several racehorses (mainly jumps as that is my biggest interest). Enter the WSOP main event each year and as many EPT's as possible. Also get all the music that I have ever wanted, be it vinyl, CD, or download (I do have a big collection, but it could always be bigger).
One other thing I would do is walk the complete coastal route of Britain. Also Wainwrights walks and climb to each of Britain's main mountains. I'm no mountaineer, but I can hike for miles and visiting Scarfell Pike, Snowden and Ben Nevis is about as much as I could physically manage. This is also something from my bucket list that I could manage right now, but never seem to get the time, haven't had a proper holiday in years and even when I did it was often a family thing. I feel my son could well be interesting in doing this with me so I may do these some time in the near future. People love critising Britain, but personally I love this country, particularly when you get out into the countryside and really take it all in.
My biggest problem is that I enjoy too many things and even if I had a limitless amount of money, do I have enough time for everthing I want to do.
10 years