Halo, Emos, reality TV, Fox news, the human race, anything related to religion - including Scientology, Britney Spears, Paris Hilton, Lindsay Lohan or any other previous trainwreck of a celebrity, the Wii, drummers, 4chan.
Once 'hatred' (read: mocking) of anything becomes too ubiquitous it just loses all meaning. When you start hearing stupid douches tell jokes about the same topics you used to laugh at, you realise how stupid and douchey your behaviour has been.
This is why I try to stay off of bandwagons. When too many people get onto that bandwagon, it becomes very cramped, smelly and filled with uncomfortable silence as it sinks increasingly deeper into the very mud everyone on board has been slinging.