Buy an estate with a main house and little farms / cottages in the grounds for my children/ friends, completely private so only people invited could be admitted (it's my lifelong plan) plus artworks, furniture etc for the same. Buy an island for holidays similarly private and somewhere warm. Buy myself and each of my children/ partners a car of their choice plus a better boat ( sorry MUCH better boat) and then just have a good old week long party.
Charitably I would donate to cancer research, mental health charities, water charities in Africa and most importantly the anti AIDS programmes running in Africa.
Practically I would have a snoop about very depressed areas and invest in long range community projects and try to aqrrange the bulldozing of some social housing estates and replacement with decent housing. On the subject of housing if I were somewhat above planning laws too I'd embark on the building of new villages to ease the social housing prolem and prevent the making of new inner city ghettos.
and I'd go shopping, because for a man I'm quite vain:)