Not really. Everything I do that makes me truly happy is free. I might be able to buy more crap I don't need if I'm incredibly wealthy, but it will be just that, crap I don't need. With my current financial situation I'm able to travel a lot, save, buy things I need (not want, so much), have enough free time to do things, so I'm happy. If I suddenly had to be given 50 million pounds in a normal low interest account, I'm willing to bet good money that there would be more than 50 million a year from now.