Some of these answers are leaning more towards things we simply just don't like, or don't want to tolerate. Hate is not a human need, but an emotion. We can control our emotions as we please.. So if you don't want hate, quit hatin' then. However, sleep, hunger, or breathing are human needs, things we need to survive. I personally would agree with sleep also. It is definitely the most time consuming "activity" that we humans need to do in order to get along with our lives, eventhough it is unconscious, quite the irony...
Side Note: I did see an episode on Ripley's where this guy from South America had a biological disfunction that would not allow him to sleep. He basically never got tired and would simply roam the streets wide awake. By the time the episode aired, he had this "illness" for 13 years. However, the narrator said that eventhough his body chemistry would not allow him to sleep, his body would eventually "wear" out and cause him to die of exhaustion.