lately I've indulged myself into finding a 3/4 letter domain and there is a surprising amount left unregistered even on .org, not to mention all the new domain

lately I've indulged myself into finding a 3/4 letter domain and there is a surprising amount left unregistered even on .org, not to mention all the new domain TLDs. this guy asked me "why would you want a 3 letter domain" and i could only answer that with "dunno. bragging rights maybe".