I got into the show due to the nerdiness, and the fact that I love pop-culture references, and probably most importantly...Sheldon's arrogant put-downs. general sarcasm and his character overall.
I have always found relationship aspect , dialogue and scenarios to be totally unfunny. After Amy became less like Sheldon and tried to move towards a more normal relationship ,her scenes also became totally unfunny to me. Some people find the relationship between Amy and Sheldon to be funny, but I cannot remember ANY of these scenes where I had a laugh. The same goes for ANY of the other romantic or relationship scenes between ANY of the characters.
The only things I found funny were the comments made by others about said relationships like the runniing gags about L/P at the beginning or Sheldons comments to Leonard if Leonard tried to discuss his problems with him.
I could put up with relationship scenes in the early days as the relationships were mainly dealt with by cast members talking about the failings of relationships. Once the protagonists actually got together themselves...no laughs....ever...as far as I can remember. And these scenes have become ever more frequent.
I predict I will see the plot summary for ep01 of se06, and not bother to watch it, for the first time in years.