Rockford Files was one of my all-time favorites.
Rockford (or Rockfish, as Isaac Hayes' character called him) was one of the first TV characters I really latched onto, as a kid (non-cartoon). I think now it was because while he was the protagonist, he was not a fake-heroic one. He was humorous, sardonic and self-depreciating. At the time, I didn't grasp the finer points. They were subtle.
My favorite episodes were when he and Angel, etc., would run a reverse scam on some high-level crook. The ones where they started drilling for oil (supposedly) on the front lawn of a country club was a classic. I thought it drew on some of Garner's Oklahoma heritage, as well.
R.I.P. James Garner/Jim Rockford.
