I've been watching these (bought my set at a drugstore about a month ago) and marvel at the good scripts, moral lessons, and humor. When we allowed Hollywood & TV to show "reality" we got filth instead. Andy Griffith and Leave It To Beaver were a lot more similar to my real home life than what was aired under the pretense of "depicting real life." I don't even know the names of the current shows, I hardly ever watch television.
Similar to AG, people like to bash LiTB as an idealistic depiction of a time that never was, but it pretty much resembles my childhood, though I grew up in the '70's: parents warn you not to do X because Y will happen; you do X anyways and Y happens; you think you've covered your tracks and gotten away with it but they find out somehow and you lose your allowance for a week. Of course, back then "X" was walking to the bowling alley without permission as opposed to, say, boinking your girlfriend in the family room.
Times sure have changed.