The discoverability of new people to follow is better than on any other service. People actually have conversations, rather than one-off posts followed by sporadic heckling. There's no sophomoric "poking," Mafia wars or invitations to inane "causes" to wade through every day. You can fine-tune the signal-to-noise ratio on Buzz very easily.
Then it hit me. Rather than controlling, containing or eliminating Buzz, why not open the Buzz floodgates and do a scorched-earth on everything else?