I play a range of sports; cricket, squash, football (soccer), golf (now that's an expensive hobby!).
I love my hifi gear, tinkering in PCs and I try to find spare time to play some games (currently playing through Asura's Wrath on PS3 and Faster Than Light on PC).
To round out the potentially expensive hobby collection, I am a coffee snob though luckily have settled with a sensible machine that didn't cost a fortune (Rancilio Silvia). But every time I see a heat exchanger machine on sale or second hand for sale I begin to wonder...