The Sopranos was two and a half seasons of awesomeness followed by four seasons of wildly inconsistent TV. Nearly every Carmela focused story was unwatchable (ooh ... will she really end up with Furio? Ugh ... the show became a soap opera for awhile.) The show jumped the shark for good with five words: I love you too johnnycakes.
For true brilliance, a show that got better every season, I have two words: The Wire.
"I've been dreaming of those johnnycakes"