Voted none of the above. Every reason to create/register a domain is unique and can't necessarily be confined into the limited 6 options. It all depends on a the application.
When it comes to a hand registration, I only buy .com.
If I am consulting for a business who wants a website and all ext's are taken, I may push them towards .tv, .us, and .info (assuming all variations of .com are taken and aftermarket prices too high).
.tv .us and .info have all been options on the table before, but ultimately we found a new clever way to reword/rework the .com.
*Word of advice - If you're ever starting a company, buy the .com before you do anything else!