Blue
Ravenous Bugblatter Beast of Traal
Foes react according to the foe. This includes hostility and aggressiveness, if they will flee, surrender, or fight to the death, and other aspects.
These ghouls may attack without provocation, fight to the death, don't coordinate in battle, use tactics, or advanced targetted, will attack downed PCs, and will stop to eat in the middle of a battle if not getting attacked.
This hobgoblin border patrol may parlay, will respond to hostility or refusal to turn around, will take or offer surrender if appropriate, closely coordinate including things like "focus fire on the healer".
This owlbear is protecting it's nest and young. It will fight to the death, but will not chase if the party is fleeing. It doesn't attack immediately, instead putting on an intimidating display to get interlopers to leave the vicinity of the nest.
Having an "always" across different monsters or situation seems like a lazy or newbie DM move, or perhaps a wargame-focused table.
These ghouls may attack without provocation, fight to the death, don't coordinate in battle, use tactics, or advanced targetted, will attack downed PCs, and will stop to eat in the middle of a battle if not getting attacked.
This hobgoblin border patrol may parlay, will respond to hostility or refusal to turn around, will take or offer surrender if appropriate, closely coordinate including things like "focus fire on the healer".
This owlbear is protecting it's nest and young. It will fight to the death, but will not chase if the party is fleeing. It doesn't attack immediately, instead putting on an intimidating display to get interlopers to leave the vicinity of the nest.
Having an "always" across different monsters or situation seems like a lazy or newbie DM move, or perhaps a wargame-focused table.