Negative reason to sleep?

[D4rkLigh7]

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.

[Ice]

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

[Dafoof]

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

[richypc]

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.

[xlaZuRelx]

The worst i had was a rude wakening by an ogre