personally I dont like smart monsters too much, it makes the dungeons here pretty boring. I liked the old days where people could actually stay in certain parts of a dungeon without having to worry about a poison ele in their face. It made dungeon raiding a lot more fun because there would be more people in there at once.
multi level dungeons with certain "safe spots". Hard to explain but remember deciet I believe where ppl would camp the lich lord, however the lich lord wouldn't always fuck u up on sight. ie: go up the stairs and thru the doors and kick your ass.
Dungeons just seem kinda boring and unpopulated to me.