Jugo is my number one favorite Naruto character ever. I don't see why many people don't like him. Maybe Kishi should give him more screen time. His character is amazing.
He's the curse mark itself which is pure evil (for use), but he is a peaceful guy. However, he gives into the darkness so much. He is yin/yang itself. His a brute so his moveset isn't like say Sasukes, but he is the curse mark afterall. That may appeal some away. I really wish they would've made him and Kimimaro a team. Their past was awesome.
Even though Kishi may've trolled Kimimaro out in this godawful rushed war arc just like he trolled Jugo during his fight with A, I hope to God they meet each other. Last thing Kimimaro said o Jugo before leaving to get Sasuke was that he'll be back/see him later. I'm waiting for that.