* the show featured multiple, lengthy segments devoted to musical performance
* moved at a leisurely pace (ala classic European films) with apparently "nothing happenning"
* almost all the main characters were fairly morally/ethically/philosophically ambiguous. The worst characters inevitably showed redeeming qualities while the best of them sooner or later displayed feet of clay. And this shifted several times in the course of the series - so you witnessed just about everyone having their moments of nobility and of utter schuckery; very much like life.
* it needed to be actively investigated to make sense; it was full of insider references as to local politics, Louisiana's history, local music venues, restaurants, music, neighborhood subcultures, etc. To be fully enjoyed, it had to be approached interactively, intensively and persistently over time -- the polar opposite of "Jerseylicious"
* finally -- I think the central character was...the city itself which indeed you got to know as intimately as you can through a fictive TV series.
having given myself over to this pretty wholeheartedly, I will aver that I came out much enriched by it having been driven to study and collect its broad range of music (marvelling at the continuity between and coherence of what'd appear to be a myriad of styles over a period of more than a century -- being conservative), master some of its marvelous foodways and -- being buoyed by its embrace and support of vivid individuality, playful deviance and an acceptance of both life and death, lively entertainment and decay...and, finally joyful defiance in the face of adversity. (and if you think I'm making this shizz up listen to performers from Jelly Roll Morton (the vocal performances) to Big Freedia.
How this ties in to "Treme" is -- actually two of the youngsters we meet in the documentary, a boy nicknamed "Bear" and a girl who goes by the name "Jazz" wound up as recurring characters in "Treme" starting in the second season - basically playing themselves; participants in after school brass band programs, enriched and excited by their experiences, the discipline, having a band leader who takes personal interest in all their students...and touched by tragedy. In "Treme" its Jazz whose best friend is murdered because she'd witnessed another child being gunned down, in real life it was Bear's brother who was shot and killed at age 19.
Previously I'd noted that Simon had also tapped Spike Lee's documentary, "When The Levees Broke"; several people who figured prominently in Lee's film wound up as characters on "Treme" most prominently Phyllis Montana LeBlanc who played Antoine Battiste's baby momma, Desiree.
It'd appear in both cases that Simon had access to these other films (all though "Gritty City" is just surfacing now, but has been in production since before "Treme" started airing) and drew directly from them for plot lines, characters, and indeed the actual people that appeared in the show. And... that's cool. Because as you view some of Simon's likely source materials and how they wound up being used...he did 'em full justice. There's no disconnects between factual material and their fictionalized incarnations in the show. Simon may have rearraanged what happened to who when and indeed created characters. But he got the overall saga straight, kept it as complicated and nuanced as it ought to be, and still turned it into coherent, to some folks, COMPELLING television.
So one of the effects of this is -- that the source materials - Lee's documentary and now "The Whole Gritty City" work beautifully as companion pieces - that expand on and illuminate matters touched on in "Treme." Or you could look at it in just the opposite way. But having watched one, the other will not seem alien at all; it'll feel entirely familiar though the documentaries are more poignant and intense because - what they depict is not "just a TV show." So don't take the step further and not expect to be moved and hopefully moved to action.
While some aspects of New Orleans have rebounded fantastically (i.e. hospitality industry -- I think that hotel rates are now HIGHER than they were BEFORE the "Federal Flood.") Meanwhile problems like poverty, education, unemployment still beleaguer folks down there.