Two definitions of "Sneakerhead," as supplied by my two most trusted sources of information:
Wikipedia: A sneakerhead is a person who is highly experienced visually even to the point of discernment in distinguishing between real and fake replicas and also owns multiple pairs of sneakers as a form of Hobby, collection, Trade and fashion.
Urban Dictionary: 1. A person who collects limited, rare, OG, or flat out exclusive kicks. Usually the collection consists of Jordans or Dunks. 2. A person with background knowledge of certain sneakers.
Regardless of how you slice it, I can never be described as a sneakerhead. I love sneakers, know a shockingly large amount about them purely by urban osmosis, but have lived on this Earth for 25.7 years with the mentality of wearing a single pair of incredible shoes until they were discolored, smelly, and at least three of my toes were exposed.
And I'm proud of this. Why? Because more often than not, said shoes that began pristine and ended up looking like victims of biological warfare were white-on-white, Air Force 1’s.