Perception

Perception represents a character's ability to perceive the world in minute detail and is one of the most broadly useful skills in Elanthia.

Perception factors into a myriad of diverse skill checks:

It is an important factor in Creature maneuver defense.
It is the only component for many searching activities required for travelling and hunting, which can be considered as fundamental as basic requirements like climbing and swimming.
Searching skill is also required for some bounties assigned by the Adventurer's Guild for heirlooms.
It's the only way to improve one's chances to counteract Stalking and Hiding skills, including noticing rangers sneaking.
Every 15 skill gives +1 bonus to foraging herbs.
It factors into Ranged Weapons attack strength and the chance to hit an aimed target with a ranged weapon.
It helps find traps laid by bandits.
Anyone popping boxes or disarming traps will have plenty of use for the skill.
Even illusions of the Sorcerer Guild are much simpler to create with better skill in perception.
A factor in searching magru, minor glacei, and major glacei, and also accessing the Red Forest.
Perception is an important component to observe or protect against the rare pickpocketing.

All told, any character can gain a very reasonable benefit by training this skill, and many recommend at least 1x training through cap.

Ranks and Training Costs

Type	Square			Semi			Pure
Profession	Rogue	Warrior	Monk	Bard	Paladin	Ranger	Cleric	Empath	Savant	Sorcerer	Wizard
Max Ranks Per Level	3	2	2	2	2	2	2	2	-	2	2
Training Point Cost	0/1	0/3	0/2	0/3	0/3	0/2	0/3	0/3	-	0/3	0/3