It was quite interesting for them to do this as most cartoons give their characters some back story. You learn the odd thing about each character (for example, a certain someone's love for more mature women), but don't expect it to expand much beyond that. When the series starts you aren't told much about the characters aside from their generic traits. But these weren't too common (either that, or I am not easily embarrassed!). Some of the humour was a bit cringey, which made me glad that I watched many of these episodes on my own.
Although these jokes could be considered predictable, it is their unpredictable placement that makes it great to watch. The comedy is so out there that you are genuinely surprised with some of the things that the characters say, even if it was just a side comment. Many say the jokes are predictable, offensive and disgusting. There has been a lot of hate for this TV show.