From what I've seen thus far, most brand TLDs never get used. (The only significant exception that comes to mind is .google, and even they never really committed to using it.) Who's been going around convincing these companies to apply for this round?
.superintelligence (17)
.registeredagent (15)
.meditativemind (14)
.intelligence (12) is also in the top 10 longest primary strings.