I don't know about the need-sleep-thing. It's realistic, granted, but it could easily become annoying. Oh no, my character needs sleep again, I'm in the middle of a dungeon, my stats are lowered and there's no place to sleep because I left my portable bed back in the farmlands. Seriously though, the first part of the sentence is what it would look like in a lot of cases. It will always be an inconvenience.
I am in blood Stepp'd in so far, that, should I wade no more, Returning were as tedious as go o'er.
