I'd like to see some predatorial behavior from some monsters. More than just the I SEE YOU I KILL. Something along the lines of tracking scents or ambushing only characters that are alone. I always liked how Antlions would attack out of nowhere in ffxi- maybe something when a player is farther than 100 yalms from another PC, it lunges out of the ground or w/e and attacks.

Also, rather than just getting rid of curious behavior why not just make it so whenever an aldgoat for example is hit by a single non-direct attack it runs away. But a second attack or any attack that is directed at the monster itself would make it return to aggressive behavior.