Agree on season 2 being the best.
Lots of great minor characters throughout the series. Sometimes the show got a little too hokey/cutesy with the hillbilly stereotypes. Other times the dialogue spun its own fantastic vernacular, but not with the consistency that Deadwood did the same. Boyd Crowder had his moments, but he was nowhere near the foil to Raylan that Ian McShane was to Seth Bullock.
And Olyphant seems only to succeed when playing the morally conflicted lawman.