This is the best Season of Curbs yet. I agree, the inroduction of "The Blacks" is fantastic, right from the start. Larry's opening line to them (I won't spoil it) is fantastic. Leon Black is a comedy superstar with one of the foulest mouths I have ever heard.
I particularly liked the close to the edge humour, touching upon racial issues, Larry's genital problem, a "stain" on the quilt, Larry's "itchy anus" (he meets a girlfriend who has the same problem), and the one where he meets the white supremicist is a classic.
Sometimes bizarre, sometimes shocking in how close to the edge it gets, but with morals and a love story and ALWAYS hilarious, boy, am I glad Larry decided to make Season 6!