I may have had more cases of trying a recommended series and liking it, compared to negative reaction to suggestions.
Off the top of my head:
* "Seinfeld" came highly recommended by a friend. It soon became my favorite show for the rest of the '90s (and in syndication). (As others have state, I understand "Seinfeld" does not have universal appeal. It's like realizing some people can't stand The Beatles).
* More a case of seeing critical acclaim, but not exploring a series until several years later: "Arrested Development." I started watching reruns and I got immersed.
* "Frasier" was recommended by same person who suggested Seinfeld. I found it worthy viewing, never truly became a fanatic, but I did follow it with some regularity for several seasons.
* Several years ago, a younger co-worker raved about "Modern Family," and since I had come to trust her taste in matters of TV & music, eventually I checked into it. Each time I've watched "MF," I got some good laughs, but I've probably seen only about 5 episodes. That's more a matter of my viewing habits than my opinion about it.
Edit: Misspelled Frasier the first time around.