I would say that Klay Thompson is a character who tries to make everyone happy and constantly puts himself in harm's way and limits his own potential.
He is not afraid to do the right thing even if it means confronting his friends.
I remember seeing a game where I think it was Curry who was starting shit during a jump ball and starting talking shit and shoved a player. His teammates rushed in to protect Curry and push the other player away, but all Klay did was watch and deep inside I knew he was shaking his head. Only until after one of his teammates shoved another player did Klay try to break them up.
Klay is truly a great guy trying to be the best shooting guard he can be. He doesn't start trouble and always respects others.
Sadly, he will never get MVP mentions because the fans think Curry is more popular than he is. Now with Durant on their team, he will never get the MVP that he always wanted. He's not jealous of his teammates and truly believes in sacrificing for the greater good of the team. But I think it pains him every year. That is why he tries his hardest in the All-Star contests. Just for once, he would like be known at being great at something.