I think the problem is the ratings for 1 hour shows are too low. 1/2 hour shows are easier to take in and people will sit and watch those. I used to love Macgyver growing up, but when it was on TV in the past few years, I tended not to watch much of it.
I watch re-runs of Matlock, NCIS, and a few others. I'd watch re-runs of Spencer for Hire if they were on. I think it was Avery Brooks that played Hawk. Damn he was HOT! My favorite character.