Grimrock

I was wondering if there is a negative reason to sleep other then the possibility and being attacked from a mob left in the dungeon floor. One time after I found a secret when I had to face a party of undead soldiers I took a nap in a corner and was awoken by a earthquake the first second of sleep. So I'm wondering if something bad will happen if I sleep too much.

If I'm not mistaken your food also drains as you sleep, but that's about it.

Is there a reason why you don't wake up automatically when fully restored, as in Lands of Lore for instance?

If you sleep when there are enemies in the next room despite there being a locked door in between, there is a chance a small group will ambush you. Happened to me on lvl 3 with about 3 spiders surrounding and killing me pretty much.

The worst i had was a rude wakening by an ogre