I enjoy seeing folks list their kids and wives as the things they spend the most money on. I have always said I robbed my dad of his expensive hobby (which was GMs) so he spent time on his less expensive hobby, computers. I spent plenty of his money growing up playing sports (not cheap) and music (also not cheap).
Now, most of my disposable income goes to my 1968 Mustang Coupe, my VW Golf TDI (winter car...new battery, temp sensor, broken good latch, crazy electronics, so far this year), and karting. I joined an indoor kart racing league and its pretty pricey, but crazy fun. My family also goes all out for gifts any chance we get, so I've dropped a few grand on Christmas already, too.