As for Sheldon, he was really asexual until he ended up with a wife. They did not push the fact he is gay. And the other characters are great as are the reoccurring guest (Cathy Bates, Teller, Bob Newhart,....)
Everyone has their likes and dislikes. About the only shows I have liked recently are Big Bang and Last Man Standing. But that's just me.
He shouts it from the rooftop by just being who he is. Doesn't matter if they try to pass him off as normal. He's obviously a flaming fruit loop. Perhaps even worse is Modern Family, another really popular show in this new, totally screwed-up world we're living in today.