do you think a fully aware person needs to sleep?

[anagogy]

Is being fully aware the ultimate state of a human being?

I wouldn't necessarily say that, because human consciousness is predicated on a certain level of limitation which equals "being human".  That experience can only be energized by a certain level of unconsciousness. 

Having said that, i think the "ultimate" human experience is looking through a human perspective  that is perfectly aligned with source.  That is the violet ray subdensity of 3rd density.  That is the most satisfying experience of 3rd density in my opinion.