I watched one season a long time ago and lost interest. A friend of mine is a super fan and subscribes to the Big Brother live feeds online where you can watch every camera 24/7 live and unedited and they tag anything of interest so you can watch daily highlights. So you can see all the shit the writers blow out of proportion and what is exaggerated and what isn't.
I think it's bizarre but strangely fascinating, my friend probably watches a few hours a day minimum during the season.