I personally have no problem with either Sheldon, the character or Jim Parsons, the actor. Jim portrayed Sheldon perfectly, in my opinion. My problem is The Powers That Be transformed TBBT into The Sheldon Cooper Show. The once ensemble show became a one main character show with a cast of supporting actors. As good as an actor Jim is or as interesting a character as Sheldon is, a didn't care for 15 minuets an episode of them. The show was better in the earlier years when it was an ensemble show. The cast blended better and complimented each other better in the earlier seasons. That's my opinion, others may see things or feel differently and that's alright too.