I was 1971, so a few years younger than you folks. For some reason The Electric Company scared the crap out of me, especially the creepy Spider-man segments. My older brother liked it, so we would watch it. But I had to watch Mr. Rogers afterward just to calm myself down. Obviously I grew out of being scared of it, but by the time I did I'd moved on to other shows.
72, no older siblings. I don't think I was allowed to watch it till I was in Kindergarten-- the same time my subscription changed from Sesame Street Magazine to Electric Company Magazine.