Agility has Flurry of Blows and stealth. Perception has The Penetrator. The medic perk can be and probably is pretty much ignored by everyone. My focus was on combat related perks that apply to other attribute builds, because doing the most damage and taking the most hits are going to be the focus of most players. Hence that big clump of people focusing Strength, yeah?If you define survival sense as anything that helps scrounging then you should have listed agility as well as having none, while perception has. If you define it more general then Int has the medic perk (which is survival related) while agility has none. If you define "getting stuff" in general then trading skills are very much in the thick of it.