I didn't really like the first series of Seinfeld - not the few episodes I saw anyway. Then I started watching the second series and really enjoyed it from then on. There have been so many classic episodes and catch phrases that have come from that show that many of us still talk about today.
Yes, a few times. I first refused to Watch Star Trek Enterprise when it came out, but then years later I discovered it wasn't so bad. I also would never watch Charmed because I caught a snippet of a scene I didn't like.l I later saw a snippet of a scene I did like, and began watching it.
When Will & Grace was on TV I flicked over to it briefly during an ad break and decided I didn't like it. It was only when the re-runs were on Foxtel years later that I gave it another try and loved it.
Yes. In fact probably about 80% of my current and all time favourite shows started out by me not liking them or more importantly not getting into them to start with. This included MASH, The XFiles, Law and Order(original), Star Trek(original and next gen), Two and a half Men and most recently and most importantly 'The Big Bang Theory' which is now one of my absolute favourites of all time. And even Seinfeld my top show of all time, like many, took me a while but I could tell there was definitely something there.