Good list, Dom.
You had two shows on your list that have, at one point, held my (one day revered) designation of Best Show on Television (ER Season 2)and West Wing Season 2).
I won't pile on about The Wire, except to say that my favorite season is one of the least-mentioned (Season 2 - not sure why I dug the unionized labor theme so much). The only part about The Wire that gives me pause is that it's almost
too good...which is to say that its devotion to realism makes it less viscerally enjoyable for me than other "entertainment" shows.
It's funny...I'm noticing a pattern...I thought that Buffy Season 2 was the best, too.
Maybe it's the combo of freshness yet familiarity...I don't know
To the West Wing comments regarding smug: I think the moving aspect of the show is the depiction of moments where the smug fails. The erudition of Aaron Sorkin is fun, to be sure, but pales in comparison to President Bartlet standing in the National Cathedral and cursing at God.