When used correctly, .info
When I say used correctly, I mean used for information rather than just for other stuff.
I love wolves and have been tempted to create a wolf-positive informational site, there I would use .info if I ever do so.
I don't like .mobi because it implies mobile and to me, proper web design uses the same url for all clients.
I don't like .biz because to me it gives the impression of cheap imitation knock-offs.