My EDC? It's my 9mm "Baby Glock", plus a spare mag, my cell phone, S.O.G. Knife, Mini-Mag LED flashlight, keys, and wallet. Most importantly of all, my brain.
My EDC is the Kahr P-40. It's light, flat, and potent.
But I usually forget my brain. Maybe I should leave it on my dresser with the keys, wallet, and Kahr so I won't forget it.