Some of them mentioned on this board.
Never saw "Frazier".... but heard it was one of the most well written sitcom's of all time.
Never saw "Hill Street Blues"... again, the scuttlebutt is that it's brilliantly written, acted - highly entertaining.
Never saw "Friends"... well.. actually I have seen 'snippets' here and there. Supposed to be hilarious.
Never saw "Seinfeld"... and again, I'm lying somewhat. This one I DID see perhaps 3 or 4 FULL episodes. I liked what I saw... but for whatever reason never acquired the habit.
Never saw "The Simpsons"... again, saw some snippets... never a full episode. When friends find out I've never seen The Simpsons they back away from me... not sure why.
Never saw "Game of Thrones"... I've been told I'd LOVE it, all caps; that it's custom made for me. I dunno.
Never saw "Breaking Bad".... which apparently means I have to surrender my man card. Well... high price to pay but I have no interest in seeing it.
Never saw "Lost".... but man on man have I heard it talked about - which is ok with me because that means I don't have to contribute to the conversation.
Never saw "South Park", "Desperate Housewives", "The Sopranos", "Mad Men", "The X Files", (I'm going off a list), "The Office", "House", "Twin Peaks"......... the list is VERY long.
Some of those I *DO* regret not having seen.... others ehhh, couldn't care less. Not a big "TV Guy" since oh.... the 80's, and in the 80's TV was cooling off for me rapidly.
Lately I'm watching more TV than I have since the 80's.... some old TV Shows but also some newer series. AND.... I've enjoyed many of them. I think I can say, without reservation, that:
I missed out on some good stuff. BUT... no regrets... the other ways I entertained myself while missing all those shows worked out just fine. - JamesJM
